Subtracting Two Matrices |
Subtracting Two Matrices - Excel |
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Hi everyone,
I need to perform a number of matrix calculations in VBA and intend to use Excel Worksheetfunctions for that. Unfortunately, matrix subtract is only know to .net and excel only knows the following matrix formulas:
.MMULT()
.MINVERSE()
.TRANSPOSE()
.DETERM()
I would like to subtract one matrix from another. My not very elegant workaround is the following:
ReDim subtract(1 To n, 1 To n)
For j = 1 To n
For i = 1 To n
subtract(j, i) = matrix1(j, i) - matrix2(j, i)
Next i
Next j
Both matrices are identical in size (req.) and symmetrical (if it matters). Is there a way of entering a non-descript array formula to calculate the difference of the two matrices?
I need to perform a number of matrix calculations in VBA and intend to use Excel Worksheetfunctions for that. Unfortunately, matrix subtract is only know to .net and excel only knows the following matrix formulas:
.MMULT()
.MINVERSE()
.TRANSPOSE()
.DETERM()
I would like to subtract one matrix from another. My not very elegant workaround is the following:
ReDim subtract(1 To n, 1 To n)
For j = 1 To n
For i = 1 To n
subtract(j, i) = matrix1(j, i) - matrix2(j, i)
Next i
Next j
Both matrices are identical in size (req.) and symmetrical (if it matters). Is there a way of entering a non-descript array formula to calculate the difference of the two matrices?
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I am attempting to figure out how to change the formula to automatically subtract a 30 minute lunch if the total time for the day exceeds 6 hours worked.
B value Time of day punch in: 9:30 AM
C value =IF(D11="","","-")
D value Time of Day punch out: 6:00 PM
E value =IF(D11="","",IF(D11
B value Time of day punch in: 9:30 AM
C value =IF(D11="","","-")
D value Time of Day punch out: 6:00 PM
E value =IF(D11="","",IF(D11
I have a spreadsheet that when I copy the formula, it copies correctly
(changes the cells it should subtract), however, the result stays the same.
It matches the formula I copied it from, even though the cells to calculate
are now different. I even did a paste special and said only formula, but
still, same result. If I actually type in the formula, it works fine, but I
have a lot I need to copy and paste. Is there a way I can fix this?
Thanks,
(changes the cells it should subtract), however, the result stays the same.
It matches the formula I copied it from, even though the cells to calculate
are now different. I even did a paste special and said only formula, but
still, same result. If I actually type in the formula, it works fine, but I
have a lot I need to copy and paste. Is there a way I can fix this?
Thanks,
Right now I have a sports league with 8 teams, I'd like to create a random 7-game schedule where each team plays the other team only once. Essentially this will be a 7-game round robin. However, I'd like to be able to use this for any number of teams and games.
I'd like to do this in Excel, but I can't figure out how to have a randomly generating non-repeating macro with text values in cells.
So right now I have a column of 8 values and need matrix of 7 columns by 8 rows next to it.
I've found this thread that has one for numbers, but I can't figure out how to do it for text values...
http://www.excelforum.com/excel-prog...m-numbers.html
Thanks all!
I'd like to do this in Excel, but I can't figure out how to have a randomly generating non-repeating macro with text values in cells.
So right now I have a column of 8 values and need matrix of 7 columns by 8 rows next to it.
I've found this thread that has one for numbers, but I can't figure out how to do it for text values...
http://www.excelforum.com/excel-prog...m-numbers.html
Thanks all!
In Excel I have been trying to find an easier way to calculate a time
difference where the times cross midnight. Example:
Start time: 23:50:00
End time: 00:15:00
How would you formulate an equation to determine the duration of time or
differnce between the start and end time?
difference where the times cross midnight. Example:
Start time: 23:50:00
End time: 00:15:00
How would you formulate an equation to determine the duration of time or
differnce between the start and end time?
I have an excel worksheet that adds two other worksheets in a data
triangle. I copied it to create a new data set and used find &
replace to change the worksheet references to the new ones.
The cells still contain the result of the old formula referring to the
previous worksheets. The only way I can get the formula to return the
correct result is to edit (F2) each cell and press enter. Calc now
(F9) does nothing.
I've seen this before, but this time, I need to calculate many
thousands of cells and don't have time for this workaround.
Any ideas?
Thanks.
Don S
triangle. I copied it to create a new data set and used find &
replace to change the worksheet references to the new ones.
The cells still contain the result of the old formula referring to the
previous worksheets. The only way I can get the formula to return the
correct result is to edit (F2) each cell and press enter. Calc now
(F9) does nothing.
I've seen this before, but this time, I need to calculate many
thousands of cells and don't have time for this workaround.
Any ideas?
Thanks.
Don S
On my calculator, if I divide 462,534.05 by 335 I get 1,380.70. Then if I times 1,380.70 by 335 I get 462,534.50. Which is what I need it to be because I need to calculate the difference of a figure not dividing equally.
On excel, if I divide 462,534.05 by 335 I get 1,380.70. Then if I times 1,380.70 by 335 I get the SAME result of 462,534.05.
I have to account for the difference of not dividing equally so there is some format or accounting function that's preset that I don't want but I have no idea how to fix it or format my excel sheet to calculate as my calculator would.
Please can someone help? Thanks!
On excel, if I divide 462,534.05 by 335 I get 1,380.70. Then if I times 1,380.70 by 335 I get the SAME result of 462,534.05.
I have to account for the difference of not dividing equally so there is some format or accounting function that's preset that I don't want but I have no idea how to fix it or format my excel sheet to calculate as my calculator would.
Please can someone help? Thanks!
Hi folks,
Hoping someone can help me quickly as I'm pulling my hair out and have a deadline getting too close.
Been trailing the net and this board but can't work out how to do a simple variance.
How do I work out the difference between two numbers - including negatives.
If the numbers are all positive, it's fine as it's simply a case of A - B = C which is your difference. However, that doesn't work if B is negative.
I need a formula that would give the following:
First Number / Second Number / Difference
1 / 5 / 4
1 / -5 / -6
-1 / 5 / 6
-1 / -5 / -4
-5 / -1 / 4
Hopefully there's a simple function I've been missing.
Thanks in advance, R
Hoping someone can help me quickly as I'm pulling my hair out and have a deadline getting too close.
Been trailing the net and this board but can't work out how to do a simple variance.
How do I work out the difference between two numbers - including negatives.
If the numbers are all positive, it's fine as it's simply a case of A - B = C which is your difference. However, that doesn't work if B is negative.
I need a formula that would give the following:
First Number / Second Number / Difference
1 / 5 / 4
1 / -5 / -6
-1 / 5 / 6
-1 / -5 / -4
-5 / -1 / 4
Hopefully there's a simple function I've been missing.
Thanks in advance, R
I need information on how to enter the proper syntax (formula) so that excel
can calculate overtime hours. In california over 8 hrs in one day is
overtime. The 8 would be considered regular hours and anything over is OT.
can calculate overtime hours. In california over 8 hrs in one day is
overtime. The 8 would be considered regular hours and anything over is OT.
I did a search in here but didn't find an answer so here goes nothing...
I have a spreadsheet with data from A1 to H1 down to A275 to H275. I select all of it, Copy, go into the Sheet2 tab and select A1, Paste Special -> Transpose and it give me the following error message:
Quote:
The information cannot be pasted because the Copy area and the paste area are not the same size and shape. Try one of the following:
- Click a single cell, and then paste.
- Select a rectangle that's the same size and shape, and then paste.
For the life of me, I can't figure out why it's not working! I have done this many times with other spreadsheets. Has anyone ever experienced this? If so, were you able to resolve it and how?
Many Thanks,
Mike
I have a spreadsheet with data from A1 to H1 down to A275 to H275. I select all of it, Copy, go into the Sheet2 tab and select A1, Paste Special -> Transpose and it give me the following error message:
Quote:
The information cannot be pasted because the Copy area and the paste area are not the same size and shape. Try one of the following:
- Click a single cell, and then paste.
- Select a rectangle that's the same size and shape, and then paste.
For the life of me, I can't figure out why it's not working! I have done this many times with other spreadsheets. Has anyone ever experienced this? If so, were you able to resolve it and how?
Many Thanks,
Mike
I have a spreadsheet with simple (addition/subtraction) formulas. The file is quite large and the formulas are too. All of a sudden, the formulas stopped working except when I double click in the cell containing the actual formula. For example, if I enter "2" in each cell, A2 and B2, cell B3 should reflect "4" because there is a formula in cell B3 which totals cells A2 and B2. Only by double clicking on cell B3 will the program actually calculate. I'm totally perplexed and so is my IT contact. Anyone?
This formula is supposed to calculate difference between today and date hired to give years and months of service. Works fine for all except if the person was hired in year 2000 then this formula shows 110 y. Any one know how to fix this? or have a different formula that works.
=DATEDIF(E21,TODAY(),"y")&" y "&DATEDIF(E21,TODAY(),"ym")&" m"
Thanks
Rick
=DATEDIF(E21,TODAY(),"y")&" y "&DATEDIF(E21,TODAY(),"ym")&" m"
Thanks
Rick
Sorry for the question. Normally I find answers to my excel questions by going through the help tab or by searching on Google. However, I don't even know what question to ask on this one!?!
Basically I have created a spreadsheet with several columns, but I have one column that lists the shirt size (YS, YM, YL, AS, AM, AL, XL, 2X, 3X) of each person. Is there a formula that I can create that will tabulate the number of sizes (i.e. AS=2, AM=7, etc.)?
In previous years I made a column for each size, and simply placed a "1" in the correct column, and had excel just add the 1's from each column. However, that takes more time and space. I was hoping to streamline it this time around.
Thanks for taking the time to read this post. Any help would be appreciated! Thanks, doug
Basically I have created a spreadsheet with several columns, but I have one column that lists the shirt size (YS, YM, YL, AS, AM, AL, XL, 2X, 3X) of each person. Is there a formula that I can create that will tabulate the number of sizes (i.e. AS=2, AM=7, etc.)?
In previous years I made a column for each size, and simply placed a "1" in the correct column, and had excel just add the 1's from each column. However, that takes more time and space. I was hoping to streamline it this time around.
Thanks for taking the time to read this post. Any help would be appreciated! Thanks, doug
Imagine a whole box of lengths of aluminium sections for making windows.
To make those windows I need to cut these lengths into smaller sizes.
I need to do this economically.
How can I use Excel to help me make this a reality.
Firstly you would take a big size out of it and then another size out of the offcut piece.
And then another size out of the offcut left over.
I need to know how many full stock lengths (6500) long it will take to cut all the pieces listed above.
Is it possible?
You need to take into account the quantity of each size and fit it all in together for the most optimal outcome.
See attached example of possible layout.
To make those windows I need to cut these lengths into smaller sizes.
I need to do this economically.
How can I use Excel to help me make this a reality.
Firstly you would take a big size out of it and then another size out of the offcut piece.
And then another size out of the offcut left over.
I need to know how many full stock lengths (6500) long it will take to cut all the pieces listed above.
Is it possible?
You need to take into account the quantity of each size and fit it all in together for the most optimal outcome.
See attached example of possible layout.
I'm working on an Excel file that it's size is about 90 M.B and that makes it very slow to deal with ... is there anyhow to make it faster ???
i use in it alot of formulas and conditional formats
thank u
i use in it alot of formulas and conditional formats
thank u
How do I calculate the number of batches per hour? Here's what I have so far:
Cell B5: start time: 4:15 formatted as 4:15:00 am
Cell B6: finish time: 6:15 formatted as 6:15:00 am
Cell B7: total time: 2:00 formula in cell: =TEXT(B6-B5,"h:mm")
Cell B8: total batches processed: 22 (this is entered manually)
Cell B9: batches per hour: formula in cell: =B8/TEXT(B7,"h")
as long as I have this formula in cell B9 the answer comes out correct which should be 11 per hour.
If the formula in B9 is B8/B7, the answer is 264.0, Is this because of the way excel is reading the total time or the total time is formatted as a time, not an actual number? Is this the correct way to solve the problem?
answer should be 11 per hour.
Cell B5: start time: 4:15 formatted as 4:15:00 am
Cell B6: finish time: 6:15 formatted as 6:15:00 am
Cell B7: total time: 2:00 formula in cell: =TEXT(B6-B5,"h:mm")
Cell B8: total batches processed: 22 (this is entered manually)
Cell B9: batches per hour: formula in cell: =B8/TEXT(B7,"h")
as long as I have this formula in cell B9 the answer comes out correct which should be 11 per hour.
If the formula in B9 is B8/B7, the answer is 264.0, Is this because of the way excel is reading the total time or the total time is formatted as a time, not an actual number? Is this the correct way to solve the problem?
answer should be 11 per hour.
Hi everyone,
I'm going nuts trying to figure out how to autofill text from one cell
to another. For example, everytime I type text into cell A20, I want
the exact same thing to cell BL20. The same for B20, BL20, etc.
How do I go about that? I already know how to copy formulas from one
cell to another by dragging the skinny black line of the cell. I guess
I just need the formula for a simple IDENTICAL copying of text.
Thanks in advance,
Mike
I'm going nuts trying to figure out how to autofill text from one cell
to another. For example, everytime I type text into cell A20, I want
the exact same thing to cell BL20. The same for B20, BL20, etc.
How do I go about that? I already know how to copy formulas from one
cell to another by dragging the skinny black line of the cell. I guess
I just need the formula for a simple IDENTICAL copying of text.
Thanks in advance,
Mike
Hello,
I have two columns of data: column A contains the date and time in the form dd/mm/yyyy. Column B contains a number value. All the times are in order, so column A looks like:
01/01/2007
02/01/2007
03/01/2007
I have data from 2007 to 2010. I need to calculate an average daily value (in column B) for each month, and display it in column C. So, for January, I need to calculate the average of 31 days, February, 28 days, etc.
Is there a function I can use to do this? I've been trying the AVERAGEIF formula but can't get it to work. Any ideas would be much appreciated!
Many thanks,
Caitlin
I have two columns of data: column A contains the date and time in the form dd/mm/yyyy. Column B contains a number value. All the times are in order, so column A looks like:
01/01/2007
02/01/2007
03/01/2007
I have data from 2007 to 2010. I need to calculate an average daily value (in column B) for each month, and display it in column C. So, for January, I need to calculate the average of 31 days, February, 28 days, etc.
Is there a function I can use to do this? I've been trying the AVERAGEIF formula but can't get it to work. Any ideas would be much appreciated!
Many thanks,
Caitlin
I am trying to do a very simple copy and paste of a simple formula in Excel 2007 and nothing seems to be working. Excel will not let me copy and paste a formula and will only paste the value into to workbook. For instance, if I make a very simple spreadsheet such as:
A1 type in 10, A2 type in =A1 (calculated A2 to be 10)
B1 type in 5
And then click the copy on B1, and then click paste special on cell B2, the only options it gives me are text and unicode text and so no matter how I paste, cell b2 will always be populated with a value of 5. I cannot imagine a simpler copy and paste and no matter what I do I can't make this work.
All cells are formatted as general. It seems that all copy and pasting of formulas in my excel has been disabled. If I open any spreadsheet on my computer, I can't copy and paste formulas, but do the exact same thing on the exact same spreadsheet on any other computer and it works no problem.
Any help?
A1 type in 10, A2 type in =A1 (calculated A2 to be 10)
B1 type in 5
And then click the copy on B1, and then click paste special on cell B2, the only options it gives me are text and unicode text and so no matter how I paste, cell b2 will always be populated with a value of 5. I cannot imagine a simpler copy and paste and no matter what I do I can't make this work.
All cells are formatted as general. It seems that all copy and pasting of formulas in my excel has been disabled. If I open any spreadsheet on my computer, I can't copy and paste formulas, but do the exact same thing on the exact same spreadsheet on any other computer and it works no problem.
Any help?
I have a file that became too big due to phantom bloat, unused range saved by Excel and all that kind of reasons. Thank to previous posts on that board tackling that issue, I was able to find how to proceed to reduce the file back to its normal size.
But I did so in a beta file (test file). The real file has become so big (103MB!) that Excel cannot even open it anymore! The file contains archive info that we do not have anywhere else.
Is there anyway then to open the file or to reduce its size without opening it (through magics...)? I just honestly don't know how to retrieve that info before deleting that file.
Thank you very much for your help.
But I did so in a beta file (test file). The real file has become so big (103MB!) that Excel cannot even open it anymore! The file contains archive info that we do not have anywhere else.
Is there anyway then to open the file or to reduce its size without opening it (through magics...)? I just honestly don't know how to retrieve that info before deleting that file.
Thank you very much for your help.
I need a formula to calculate Turn Around Time. Find below the sample data and details for your reference.
Received Date & Time: 10/29/2010 3:27:00 PM
Completed Date & Time: 11/1/2010 3:57:32 AM
Business Hours: 08:00 AM to 05:00 PM
Non Business hours: 05:00 PM to 08:00 AM
Weekdays : Monday to Friday
Weekends: Saturday & Sunday
If I calculate TAT for this time period it should show me 1 hour 33 minutes, why because business hours are closing by 5:00 PM on 10/29 so it should not calculate duration after 5:00 PM to until 08:00 AM on next day, however 10/29 is Friday so formula should calculate the duration from 10/29 Friday 3:37 PM to 10/29 5:00 PM and again it should calculate from 8:00 AM on 11/01 Monday and formula should skip Saturday & Sunday.
In this scenario I have completed the task before 8:00 AM on 11/01 so it should show duration of 1hour 33 minutes.
Please let me know if you need any more details
Received Date & Time: 10/29/2010 3:27:00 PM
Completed Date & Time: 11/1/2010 3:57:32 AM
Business Hours: 08:00 AM to 05:00 PM
Non Business hours: 05:00 PM to 08:00 AM
Weekdays : Monday to Friday
Weekends: Saturday & Sunday
If I calculate TAT for this time period it should show me 1 hour 33 minutes, why because business hours are closing by 5:00 PM on 10/29 so it should not calculate duration after 5:00 PM to until 08:00 AM on next day, however 10/29 is Friday so formula should calculate the duration from 10/29 Friday 3:37 PM to 10/29 5:00 PM and again it should calculate from 8:00 AM on 11/01 Monday and formula should skip Saturday & Sunday.
In this scenario I have completed the task before 8:00 AM on 11/01 so it should show duration of 1hour 33 minutes.
Please let me know if you need any more details