1.869 total contributions since 2014

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

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...

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...

alrededor de 21 horas ago | 1

| accepted

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...

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...

1 día ago | 0

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) ...

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) ...

1 día ago | 0

Answered

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...

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...

5 días ago | 1

| accepted

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...

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...

5 días ago | 0

Answered

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...

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 días ago | 1

| accepted

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...

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 días ago | 0

Answered

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...

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...

8 días ago | 0

Answered

replace duplicate value by 0 in matrix or vector

[C,ia] = unique( b ); b( setdiff( 1:numel(b), ia ) ) = 0;

replace duplicate value by 0 in matrix or vector

[C,ia] = unique( b ); b( setdiff( 1:numel(b), ia ) ) = 0;

8 días ago | 1

Answered

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 ...

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 ...

9 días ago | 0

Answered

disp function error in matlab coder

disp is not supported by Coder. sprintf should work though.

disp function error in matlab coder

disp is not supported by Coder. sprintf should work though.

9 días ago | 0

Answered

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...

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...

9 días ago | 0

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 );...

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 );...

13 días ago | 0

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Answered

extract logical locations that match array

B .* A would seem to give what you want

extract logical locations that match array

B .* A would seem to give what you want

14 días 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...

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...

15 días ago | 0

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Answered

Convert Z dimension to X dimension

myArray(:) will do for that kind of reshape, where myArray is obviously the array you start with.

Convert Z dimension to X dimension

myArray(:) will do for that kind of reshape, where myArray is obviously the array you start with.

23 días ago | 0

| accepted

Answered

Initial centroids selection - Kmeans

doc kmeans shows the idx = kmeans(X,k,Name,Value) function signature. If you look at the options for 'Name', 'Value' pairs y...

Initial centroids selection - Kmeans

doc kmeans shows the idx = kmeans(X,k,Name,Value) function signature. If you look at the options for 'Name', 'Value' pairs y...

27 días ago | 0

| accepted

Answered

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

Has there been any further thought on changing what is considered a compulsory field for users asking a question? Title, body a...

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

Has there been any further thought on changing what is considered a compulsory field for users asking a question? Title, body a...

27 días ago | 2

Answered

How to define range using a variable in xlsread?

doc sprintf can create a string out of variables, e.g. columnStr = 'B'; startRow = 50; endRow = 50; sprintf( '%s%i:EHI%i', ...

How to define range using a variable in xlsread?

doc sprintf can create a string out of variables, e.g. columnStr = 'B'; startRow = 50; endRow = 50; sprintf( '%s%i:EHI%i', ...

28 días ago | 0

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Answered

SOM codebook vectors output

net.IW{1} will give you the codebook vectors/weights. For example: x = simplecluster_dataset; net = selforgmap([8 8]); net ...

SOM codebook vectors output

net.IW{1} will give you the codebook vectors/weights. For example: x = simplecluster_dataset; net = selforgmap([8 8]); net ...

29 días ago | 0

Answered

How to automatically put the asked values in function by script?

You would have to define a function that takes two arguments (or an array of inputs to add), e.g. for an example of a fixed two ...

How to automatically put the asked values in function by script?

You would have to define a function that takes two arguments (or an array of inputs to add), e.g. for an example of a fixed two ...

30 días ago | 0

Answered

Dimensions of arrays being concatenated are not consistent.

Results_Values=[Amp',N',T',[velocity NaN].'];

Dimensions of arrays being concatenated are not consistent.

Results_Values=[Amp',N',T',[velocity NaN].'];

alrededor de 1 mes ago | 1

| accepted

Answered

Could anyone help me how to store the result together in single matrix.

Making minimal changes to your code: B=[1 2; 1 3; 2 5; 2 4; 3 5; 4 6; ...

Could anyone help me how to store the result together in single matrix.

Making minimal changes to your code: B=[1 2; 1 3; 2 5; 2 4; 3 5; 4 6; ...

alrededor de 1 mes ago | 0

| accepted

Answered

How to generate random matrix from another one?

newMatrix = reshape( oldMatrix( randperm( numel( oldMatrix ) ) ), size( oldMatrix ) ); should work, though I'm sure there are n...

How to generate random matrix from another one?

newMatrix = reshape( oldMatrix( randperm( numel( oldMatrix ) ) ), size( oldMatrix ) ); should work, though I'm sure there are n...

alrededor de 1 mes ago | 0

Answered

Array indices must be positive integers or logical values

for i = length(Mag) doesn't make sense as this will just evaluate to a scalar. I don't see how this would be the source of you...

Array indices must be positive integers or logical values

for i = length(Mag) doesn't make sense as this will just evaluate to a scalar. I don't see how this would be the source of you...

alrededor de 1 mes ago | 0

| accepted

Answered

Put label in colorbar

The label object should have a position that you can edit. The rotation of 270 rather than 90 moves it inside the tick labels f...

Put label in colorbar

The label object should have a position that you can edit. The rotation of 270 rather than 90 moves it inside the tick labels f...

alrededor de 1 mes ago | 1

| accepted

Answered

Determination of data points in each cluster of K-means algorithm

accumarray( idx, 1 );

Determination of data points in each cluster of K-means algorithm

accumarray( idx, 1 );

alrededor de 2 meses ago | 0

Answered

undefined function 'isnan' for input arguments of type 'table'

Assuming data is a table, try using curley braces { } instead of parentheses ( ), i.e. y=data{:,20}; X=data{:,[17:19,21:29]}; ...

undefined function 'isnan' for input arguments of type 'table'

Assuming data is a table, try using curley braces { } instead of parentheses ( ), i.e. y=data{:,20}; X=data{:,[17:19,21:29]}; ...

alrededor de 2 meses ago | 0

| accepted

Answered

Transfer variables within function with different properties.

Either return it as an output argument from the previous function and pass it in as an input argument or store it as a class pro...

Transfer variables within function with different properties.

Either return it as an output argument from the previous function and pass it in as an input argument or store it as a class pro...

alrededor de 2 meses ago | 1

| accepted

Answered

Using the function fmincon

The first argument needs to be a function handle, not a call to the function, although your function is FUNCTION so I'm not sure...

Using the function fmincon

The first argument needs to be a function handle, not a call to the function, although your function is FUNCTION so I'm not sure...

alrededor de 2 meses ago | 0