Answered
locked output files students can turn in
What information are the students being called upon to provide as the work to be graded? A modified or new app? A script or func...

6 years ago | 0

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Answered
Rearranging dates to make them suitable for datetime format
If you need to import data in multiple formats, start by trying to import all the data in one of the formats. The entries that c...

6 years ago | 0

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Speed up code - deletion of rows/columns
I'm guessing you're doing this in a loop. In that case consider the old song 99 Bottles of Beer, slightly modified. 99 bott...

6 years ago | 0

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The default interpreter for the 'title' command is 'tex'. How can the default be changed to 'latex'?
There is no way to change the default Interpreter just for axes titles. Axes titles are not their own type of object, they are t...

6 years ago | 2

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YTickLabels repeating themselves?
Not a bug. From the table of uiaxes properties in the documentation, specifically the entry for XTickLabel / YTickLabel / ZTick...

6 years ago | 0

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Answered
How to calculate mean and std of array full of subarrays?
A = [1, 6; 1, 8; 2, 4; 3, 6; 3, 4; 3, 1]; G = groupsummary(A(:, 2), A(:, 1), {'mean', 'std'}) The first column of A contains t...

6 years ago | 0

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Answered
I need the results as matrices but in loop please see following
Can you define variables with numbered names like X1, X2, X3, ... ? Yes. Should you do this? Generally we recommend against it....

6 years ago | 0

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How to create a new function file using functions and variables available in base workspace?
If the functions are "big nasty functions" I'm guessing they're symbolic expressions. If so use dsolve to solve symbolically or ...

6 years ago | 0

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Error in HDL Coder- Fixed point conversion "MATLAB expression 'r' is not of the correct class: expected 'double', found 'sym'."
None of the functions from Symbolic Math Toolbox are on the list of functions supported for HDL code generation. I haven't used ...

6 years ago | 0

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Answered
I tried to run a script with a function, but my function input name show 'the function might be unused'. Please help anyone?
Rather than defining the Fun1 function as a function inside the script hmwk1_problem1a.m I would define it as a regular function...

6 years ago | 0

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Removing time from datetime
If you want to change how it is displayed, change the Format property. >> dt = datetime('now') dt = datetime 23-Au...

6 years ago | 5

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Answered
Add time to datetime format
A datetime array generally has a time component, even if it's not shown[*]. >> dt = datetime('today') dt = datetime ...

6 years ago | 2

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How i can find the value of c that minimum integration from 0 to 4 x/x-c dx ??
Your question doesn't make sense to me. If you want to specify a value for c then perform that integration, see the "Parameteriz...

6 years ago | 0

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Can MATLAB workspace spreadsheets be updated while in a loop?
As of release R2016a there is a button in the Editor that lets you pause running code and enter debug mode. It may take a little...

6 years ago | 0

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Error in sym: Character vectors and strings in the first argument can only specify a variable or number.
As of release R2018a, calling sym with a char input that is not a valid variable name or a number will error. Modify the code so...

6 years ago | 0

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how to create num2str in a variable
Can you do this? Yes. Should you do this? Generally we recommend against it.

6 years ago | 1

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Is there a way to convert table columns and terms into regular numbers?
You haven't showed us the text of the error, but I'm guessing it was: Error using seconds (line 19) Input data must be a real,...

6 years ago | 0

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Matlab doesn't start(it's installed and activated )
Please contact Technical Support using the telephone icon in the upper-right corner of this page for help with installation and ...

6 years ago | 0

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"LevelList" value setting in "Contourf" drawing mode
As shown in the figure, the proportional array "0,2e+4,2e+8,2e+12,2e+16,2e+20,2e+24,2e+28" is set in "LevelList". Take another ...

6 years ago | 0

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Find maximum value of array within specified range, consecutively
Use the groupsummary function.

6 years ago | 0

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I have 4GB ram installed on my laptop but the matlab shows only 2GB RAM why?
Are you using the 32-bit version of MATLAB? The limitation on how much memory you can access in a 32-bit application is much low...

6 years ago | 0

Answered
Forward and backward substitution of triangular matricies
function x=myForwardSubstitution(L,b) d=size(L,1); L=[1,0;1,1]; You define d using the L matrix with which the user of...

6 years ago | 0

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how to resolve and the reason the 'dot indexing not supported for this type of variable' error?
filePattern isn't a struct array, it's a char array. You want to loop over elements of srcFiles (the output of dir is a struct ...

6 years ago | 1

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Does imsegkmeans2 exist? If so, where is documentation on it?
That looks to me like a typo (I think it should be imsegkmeans3) in that Note. I'll report that to the documentation staff.

6 years ago | 0

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Answered
Create Incidence matrix from Graph theory?
The incidence matrix you posted in your comment on Binbin Qi's answer is not the correct incidence matrix for the digraph you pr...

6 years ago | 1

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MATLAB 2020b does not reload .m file edited outside of matlab until after running
Release R2020b has not been released yet, so I suspect you're using the Prerelease of R2020b. Please send questions or feedback ...

6 years ago | 0

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How to set colorspace of line in special code of graph?
There's no need to create additional lines to change the colors of lines in a GraphPlot. highlight them instead. % Create graph...

6 years ago | 1

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Answered
Histogram won't plot decimals
What does this command display? class([a(1:135756).column4]) My guess is that it will probably display something like char or ...

6 years ago | 1

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Answered
How to avoid running superclass constructor?
You cannot avoid the superclass constructor being called (explicitly or implicitly) from the subclass constructor. From the docu...

6 years ago | 1

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Answered
How to normalize rows of a matrix?
Are you required to use a loop? If not, take a look at the normalize function.

6 years ago | 0