Answered
What does z(1) and z(2) mean in that context?
z(1) and z(2) mean the same as they would in any code - there is an expectation that z is an array with (at least) 2 values, oth...

6 years ago | 2

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Answered
Index must be a positive integer less than or equal to the number of test sets.
selectBatch(k) is a cell array, which clearly is not an integer. selectBatch{k} may be what you want instead. That said, you...

6 years ago | 0

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check a condition once and remember it later in the code
Potentially you can change your if statement to the following, but it depends on what nu is as this does not seem to be defined ...

6 years ago | 1

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Answered
Variable inside timer callback is lost after first iteration in GUI - undefined function or variable
This seems like the opposite problem to what I originally thought it was as I got distracted by the handles and assumed they wer...

6 years ago | 1

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Increase levels on colorbar
If you create the colourbar and keep its handle, e.g hColourbar = colorbar( hAxes ); then you can edit the properties of the c...

6 years ago | 0

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Question

Working with 1d vector sequences
This is a problem I seem to come up against quite often in Matlab and have never really found a good solution to. Maybe there i...

6 years ago | 2 answers | 0

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answers

Answered
(Index in position 1 exceeds array bounds (must not exceed 1). error is popping up where it does not seem to apply
Well, I don't know about line 12, which (from counting - please indicate which is the line of the error message in future, it wo...

6 years ago | 0

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Store only 4 value from a loop
If you have a nested loop like that you would generally want something like x(t,i) = ... with a 2d output to match the 2 neste...

6 years ago | 0

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Detecting change in sign of values of a column
NewC = find( diff( sign( Data(:,2) ) ) ) + 1;

6 years ago | 1

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Answered
How to reshape a matrix into nx2 matrix?
reshape( A( :, [ 1:2:end, 2:2:end ] ), [], 2 ) You may wish to change the final two arguments to the reshape command in diffe...

6 years ago | 0

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Answered
Unable to use a value of type cell as an index
You are passing in a variable called title to the second function. This will hide the function of the same name so that this in...

6 years ago | 4

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Answered
Assining fixed color for zero value
Define a colourmap of size n, assuming n is not huge, and then add black to the front of it n = 7; colourmap = [0 0 0; parula(...

6 years ago | 0

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Answered
Any way to use British spellings for function calls and arguments?
https://blogs.mathworks.com/loren/2016/04/01/the-queens-matlab/ I took this seriously at first and was appalled! Not because I...

6 years ago | 2

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Matlab data classes advantages
https://uk.mathworks.com/help/matlab/matlab_prog/fundamental-matlab-classes.html In basic terms obviously floating point (doubl...

6 years ago | 0

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How to concatenate 2 cell arrays containing strings?
vertcat( x{:} )

6 years ago | 0

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Answered
Why do I need to declare a variable inside a nested 'for' loop?
You are referring to it on the right-hand side of the equation as well as on the left. First time round it does not exist yet s...

6 years ago | 1

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Answered
signal processing (segmentation in time domain)
sig1 = sig( t >= 0.34 && t <= 4 ); sig2 = sig( t >= 6 && t <= 8.5 ); If you also need the t vector then apply it similarly. J...

6 years ago | 0

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Answered
finding inverse exponential value
If i and j are pixel values then you must have an image to which they are applied, e.g. im, in which case simply exp( -im(i,j) ...

6 years ago | 0

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Reference to non-existent field error
exist('handles.mystructdata') does not work for struct fields. isfield( handles, 'mystructdata' ) is what you should use to c...

6 years ago | 1

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Answered
How to replace values of certain rows in a matrix?
a( [2 3], : ) = repmat( b, 2, 1 ) A bit more generally: indicesToReplace = [2 3]; a( [2 3], : ) = repmat( b, indicesToReplace...

6 years ago | 0

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FFT step by step help
The lpad part is a little suspicious. If you have an odd length of signal it will not work as is. Apart from that though: xdf...

6 years ago | 1

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Answered
Index exceeds the number of array elements
[A, index] = unique (A); replaces what was in A with the result of unique (i.e. all the non-unique values removed) So indexing...

6 years ago | 0

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Get position when using uicontextmenu
I use code like this to position my context menu under the cursor on an axes, though if you already have the figure handle at th...

6 years ago | 0

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replace duplicate value by 0 in matrix or vector
[C,ia] = unique( b ); b( setdiff( 1:numel(b), ia ) ) = 0;

6 years ago | 1

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Unrecognized function or variable 'axes34_CreateFcn'.
Unless you have explicitly created one axes don't have a createFcn set by default, so I assume you must have asked it to create ...

6 years ago | 0

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disp function error in matlab coder
disp is not supported by Coder. sprintf should work though.

6 years ago | 0

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How to create empty matrix in matlab?
myMatrix = cell( 10 ); would create a 10x10 cell array. If all your images are the same size though you'd be better off with t...

6 years ago | 1

Answered
How can I display a specific frame in my image series ?
image10 = allImages( :, :, 10 ); images2_5 = double( allImages( :, : [2 5] ) ); image2_minusImage5 = diff( images2_5, [], 3 );...

6 years ago | 0

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Answered
extract logical locations that match array
B .* A would seem to give what you want

6 years ago | 0

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Answered
how to select the desired range of each dimension from the 3d array?
new_precipitation = precipitation( 1400:1439, 500:519, 700:900 ) would create what you ask for though it will be 1 bigger in ea...

6 years ago | 0

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