# Adam

Professional Interests: Signal Processing, OOP, Matlab GUI programming, Machine Learning

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**Content Feed**

Question

Change to code formatting behaviour in editor in R2021b?

Does anyone know if this is a change in default formatting behaviour for indents and formatting behaviour or whether I am just m...

13 days ago | 1 answer | 0

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answerRemoving "head" entry from doubly linked list

Unless I am totally misunderstanding (possible given my initial confusion in my comment) your class works fine. What isn't fine...

13 days ago | 1

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how to find the count of unique values of a column in a array?

doc histcounts should give you the number of each of the elements in your array, so long as you parameterise it correctly if yo...

27 days ago | 0

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how to create a vector with known indices numbers

result = vector( positions ); will give you this, if what you mean is you want the numbers from those positions of vector rathe...

1 month ago | 0

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what does k = 0:25.5:255 function means

doc colon It means create an array starting at 0, incrementing by 25.5 each time, with a maximum value of 255. Easiest way to ...

1 month ago | 0

| accepted

Resize and sum a matrix

If you have the Image Processing Toolbox you can use blockproc something like the following: array2 = blockproc( array1, [n n],...

11 months ago | 2

| accepted

Whats the difference when using [ ] and : ?

key = [1 2 3 4 5 6 7 8 9 10]; res = reshape( key, 2, [] ); would give res = [ 1 3 5 7 9 2 4 6 8 10 ]; The [] indica...

12 months ago | 1

Get row and column of the closest value of a matrix from a variable

If you are using an up to date version of Matlab (scanning the release notes I think R2019a or later for the particular syntax o...

1 year ago | 0

How to round the decimal values?

ceil( 0.7954 * 1000 ) / 1000 It should also be noted though that many seemingly 'round' decimal numbers cannot be perfectly rep...

1 year ago | 0

Problem with loop index

Calculate the indices of all the rows you want to delete , then delete them all in one go afterwards, as e.g. rowsToDelete = [...

1 year ago | 1

How to remove outlier by 2.5 standard deviations from the mean?

Looking at the help in doc filloutliers this should work: filloutliers(A,'center','mean','ThresholdFactor', 2.5) replacing A...

1 year ago | 1

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How to make subplot accept the positions like matrix?

doc ind2sub This will convert linear indices to n-dimensional subscripts. e.g. [p(1), p(2)] = ind2sub( [3, 3], 2 );

2 years ago | 1

| accepted

input vector fra edit text in guide GUI

sscanf( str, '%d' ) or str2num( str ) would both work if the input is e.g. "1 2 3 4 5 6", although the first returns a column...

2 years ago | 0

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Defining a time varying function

if t < t0 result = a; else result = b; end gives what you want for this simple case, provided t0, a, b and t are al...

2 years ago | 0

i have different result

Just get rid of the loop and vectorise: ProbDG=1-(1./T); DGT=-log(-log(ProbDG)); It can be done in a loop, but it's the end o...

2 years ago | 0

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What are the options to use a script in app designer? and how to define it?

You don't have to, but you should want to as scripts are not suitable for going beyond just trying things out. Once you want to...

2 years ago | 0

| accepted

How to get handle to legend in a specific axes?

Legends are parented by the figure, not the axes, so you get a list of figure children like this: >> get( gcf, 'Children' ) an...

2 years ago | 0

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Combine two or more gaussian components into one Gaussian Mixture (gmdistribution)

Doesn't GC = gmdistribution( [muX; muY], cat( 3, SX, SY ), [1; 1] ); work?

2 years ago | 0

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divide 3d matrix (840,64,1536) by 1d matrix (1536,1)

A ./ reshape( B, [1 1 1536] );

2 years ago | 1

How do I extract the rows that have value 0 in one array from another new array?

newArray( ~thisArray, : ) where thisArray is the one you show here.

2 years ago | 1

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What type of data (200 x 200 x 200)

It's an array. A 3d array to be precise, but just an array. A vector (as defined by isvector(...) )is an nx1 or 1xn array A m...

2 years ago | 1

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" bsxfun(@rdivide..." Explain Use in Code

rgbh_e = bsxfun(@rdivide, rgbh_e, rgbh_e(4,:)); divides rgbh_e by by the 4th row of rgbh_e, on a per row basis - i.e. each elem...

2 years ago | 0

In which Matlab version was rng() introduced?

https://uk.mathworks.com/help/matlab/release-notes.html?rntext=rng&startrelease=R2006a&endrelease=R2019b&groupby=release&sortby=...

2 years ago | 1

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what is wrong with my script?

2:4 means [2, 3, 4] A( [2 4], [2 4] ) would give what you want.

2 years ago | 1

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Arguments block syntax not being recognised

This was only introduced in 2019b (you can see at the bottom of the help page for 'arguments'). It is one of the disadvantages ...

2 years ago | 1

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Matrix creation combining vectors

M = [ repmat( V1(:), [numel(V2), 1] ), repelem( V2(:), numel( V1 ) ) ];

2 years ago | 0

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Help with restricting input

validateattributes( number, { 'numeric' }, { 'scalar', '>=', 1, '<=', 100, 'integer' } ) You would have to put a message togeth...

2 years ago | 0

MATLAB Answers Wish-list #5 (and bug reports)

I realised I posted this in the ancient wishlist thread before. Can we not have some white space back between answers? Since t...

2 years ago | 1

How to ignore letters in a numeric cell?

cellfun( @(x) str2double( erase( x, 'mm' ) ), pin_radius ) should convert them to an array of doubles. If you are using pre R2...

2 years ago | 1

| accepted