Answered
How to remove hundreds of columns from a matrix?
First thing that comes to mind, which may or may not be the only problem: Never delete parts of an array from the front in a lo...

6 years ago | 1

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Answered
Find all combinaisons of sum of two vector that corresponds to the value of a third vector
Well, what you wrote: 1./(1./A + 1./B) will give you answers you can compare to C as e.g. abs( 1./(1./A + 1./B) - C ) to giv...

6 years ago | 0

Question

javaaddpath 'objects of...class exist' warning
I have run into a situation using multiple 3rd party functions from the file exchange. Both of these rely on java classes and b...

6 years ago | 0 answers | 1

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answers

Answered
Removing outliers from data
threshold = 3 * std( data ); validRange = mean( data ) + [-1 1] * threshold; dataWithoutOutliers = data( data >= validRange(1)...

6 years ago | 2

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Answered
finding x axis in findpeaks
doc findpeaks clearly shows there are numerous ways to call the function, including: [pks,locs] = findpeaks(data) where locs ...

6 years ago | 0

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Answered
multiply table and matrix
Why all the complications with cell arrays and tables? Just use numeric arrays: A = [0.2 0.5 0.3; 0.1 0.1 0.3]; B = [2;3]; C...

6 years ago | 1

Answered
Randomly change certain characters of a character matrix
If you mean basic letters, then e.g. idx = randi( numel( yourCharArray ), 1000, 1 ); replacementChars = char( randi( 26, 1000,...

6 years ago | 0

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Answered
How can I use Function handle with arrays?
Not really sure how the code you posted, with syms and matlabFunction is connected to what you are asking, but this function sho...

6 years ago | 0

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Answered
Select all eelements equal to a number
b = x( 1:find( x == 4, 1, 'last' );

6 years ago | 0

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Answered
Turning separate columns of data into a single column or vector.
times = []; for ... ... times = [ times; A.data(:,1) ]; ... end You will get warnings about variable growing in...

6 years ago | 0

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Answered
Apply an element-wise calculation of an equation to a matrix
log( X ./ Y ) ./ Z 100 ./ log( X ./ Y ) - 50

6 years ago | 0

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Answered
Find function for cell array
wantedArray = [1,122,185]; cellfun( @(x) isequal(x,wantedArray), myCell ); You would be better off using a numeric array thoug...

6 years ago | 1

Answered
What are the thought processes that go on when you are trying to solve a MATLAB problem?
I make very heavy use of the debugger, in combination with the command line to try out syntax and options. I also often like to...

6 years ago | 1

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Answered
Accesing structure using a function
total = campus.( building ).( year ).( var ); should work fine, assuming campus is your struct and that is a branch of the stru...

6 years ago | 0

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Answered
how to get the RGB number from colorbar
colourmap = colormap( hAxes ); where hAxes is the axes handle. gca if you really must! You can then interpolate it to make it...

6 years ago | 0

Answered
How can I change variables within a GUI to make plot using the data from user input?
Simplest option is simply to create variables g = []; valzero = []; (or initialise them to a default value) at the top of y...

6 years ago | 0

Answered
Accept a specific type of file Matlab
doc uigetfile gives examples of specifying filters for file type. You can use a generic uigetfile and a check like that after ...

6 years ago | 0

Answered
Find the index of given value in an array
val = 2.5; idxAboveVal = find( array >= val, 1 ); idxFract = idxAboveVal - ( array( idxAboveVal ) - val ) / ( array( idxAboveV...

6 years ago | 1

Answered
Call to Subplot is Adding Axis to Current Figure
Yes, that does seem a slightly odd thing to have in the startup file and is indeed the cause of this behaviour (I just tested wi...

6 years ago | 0

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Answered
plz i need help to make this , thank u
[~, idx] = min( MA ); resA = A(:,idx);

6 years ago | 0

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Answered
Random order, but equally appearance
doc randperm

6 years ago | 1

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Answered
How to recognize if there is in a character a point '.'?
What is wrong with simply xx == '.' if xx is a char array rather than a string as it seems to be?

6 years ago | 0

Answered
What does 'Colormap' do to the image with double/float pixels？
Data is linearly binned into however many bins/elements your colourmap has and that colour applied. e.g. if your data is 0-1 an...

6 years ago | 0

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Answered
Writing a Matrix 6x6 in one line
A = 1:36; I may be misunderstanding the question, but if not then it would seem to be that simple? or A = A(:)'; if you are ...

6 years ago | 0

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Answered
Feature Request: Refactoring tool
This is still such a huge frustration all the way into R2019a. Even things that should be so simple can take on epic proportion...

6 years ago | 4

Answered
Undefined operator '+' for input arguments of type 'function_handle'.
A2 = V2a + U2(t) ; would be a function call. You only use the @(t) when defining a function handle, not when actually calling...

6 years ago | 0

Answered
[DISCONTINUED] MATLAB Answers Wish-list #4 (and bug reports)
One or two things with respect to notification preferences and Activity Feed that I would like: Having a preference to not auto...

6 years ago | 4

Answered
Ylim is not working
Use explicit axes handles for plotting instructions and instructions like hold, ylim, xlim. i.e. hAxes(1) = subplot(3,1,1); sc...

6 years ago | 2

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Answered
How to set the x-aixs when plotting with certain row and column of matrix
I'm surprised you can see anything useful on that using plot rather than an image, but the plot function takes multiple argument...

6 years ago | 0

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Answered
Undefined variable or class error
The variable in your mat file is called NEWSST, not NEWSST_2015. It is usually better though to load a mat file into a struct a...

6 years ago | 0

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