Submitted

Round Dates and Times

Round dates/times to the nearest unit (round/floor/ceiling).

19 Tage ago | 3 downloads |

Answered

Change from set notation to dot notation

The MATLAB documentation explains that dot-notation only applies to scalar objects: https://www.mathworks.com/help/matlab/creat...

Change from set notation to dot notation

The MATLAB documentation explains that dot-notation only applies to scalar objects: https://www.mathworks.com/help/matlab/creat...

19 Tage ago | 0

| accepted

Answered

How to read a file containing non numerical characters and commas?

opt = {'HeaderLines',22,'MultipleDelimsAsOne',true}; str = fileread('He_2.txt'); str = strrep(str,',','.'); C = textscan(str,...

How to read a file containing non numerical characters and commas?

opt = {'HeaderLines',22,'MultipleDelimsAsOne',true}; str = fileread('He_2.txt'); str = strrep(str,',','.'); C = textscan(str,...

19 Tage ago | 0

Answered

how to avoid using a name to a specific file in GUI

Your explanation is not clear if you know Specificname in advance or not, or how many variables there are saved in the .mat file...

how to avoid using a name to a specific file in GUI

Your explanation is not clear if you know Specificname in advance or not, or how many variables there are saved in the .mat file...

19 Tage ago | 0

| accepted

Answered

Experts of MATLAB, how did you learn? Any advice for beginner/intermediate users?

I reject the label "expert", but here is my two cents worth anyway: MATLAB Specific: MATLAB has a great feature that very few ...

Experts of MATLAB, how did you learn? Any advice for beginner/intermediate users?

I reject the label "expert", but here is my two cents worth anyway: MATLAB Specific: MATLAB has a great feature that very few ...

20 Tage ago | 59

| accepted

Answered

Import .txt and save as .mat with conditions

As you did not supply an example file I created my own (attached). [fid,msg] = fopen('test.txt','rt'); assert(fid>=3,msg) C =...

Import .txt and save as .mat with conditions

As you did not supply an example file I created my own (attached). [fid,msg] = fopen('test.txt','rt'); assert(fid>=3,msg) C =...

20 Tage ago | 0

| accepted

Answered

How can I create a fullpath from images of different subfolders?

Do not use path as a variable name (you shadow the inbuilt function of that name). Do not concatenate strings to build paths. ...

How can I create a fullpath from images of different subfolders?

Do not use path as a variable name (you shadow the inbuilt function of that name). Do not concatenate strings to build paths. ...

21 Tage ago | 0

Answered

convert milliseconds (ms) to seconds (s)

You can change the format of how numbers are displayed, e.g. "shortG" >> format shortG >> ms/1000 ans = 1600.9 ...

convert milliseconds (ms) to seconds (s)

You can change the format of how numbers are displayed, e.g. "shortG" >> format shortG >> ms/1000 ans = 1600.9 ...

23 Tage ago | 1

| accepted

Answered

From a given vector create all combinations possible

>> V = [5,10,15]; >> [X,Y] = ndgrid(V); >> M = [Y(:),X(:)] M = 5 5 5 10 5 15 10 5 10 10 ...

From a given vector create all combinations possible

>> V = [5,10,15]; >> [X,Y] = ndgrid(V); >> M = [Y(:),X(:)] M = 5 5 5 10 5 15 10 5 10 10 ...

23 Tage ago | 0

| accepted

Answered

Finding values of specific range from table row or column

>> A = [12345 NaN NaN NaN NaN 457 NaN NaN NaN 785 NaN NaN NaN NaN NaN NaN 74502].' A = 12345 NaN NaN NaN NaN ...

Finding values of specific range from table row or column

>> A = [12345 NaN NaN NaN NaN 457 NaN NaN NaN 785 NaN NaN NaN NaN NaN NaN 74502].' A = 12345 NaN NaN NaN NaN ...

23 Tage ago | 2

| accepted

Answered

Regular Expression to timestamp

>> rgx = '(?<H>\d*)(?(1):)(?<M>\d+):(?<S>\d+)\.(?<F>\d+)'; >> regexp('11:32.456',rgx,'names') ans = H: '' M: '11' ...

Regular Expression to timestamp

>> rgx = '(?<H>\d*)(?(1):)(?<M>\d+):(?<S>\d+)\.(?<F>\d+)'; >> regexp('11:32.456',rgx,'names') ans = H: '' M: '11' ...

24 Tage ago | 0

Answered

Rescaling a variable with NaNs

>> M = randi(7,3,5); >> M(randi(numel(M),1,3)) = NaN M = 6 7 7 6 4 3 NaN 5 NaN 6 ...

Rescaling a variable with NaNs

>> M = randi(7,3,5); >> M(randi(numel(M),1,3)) = NaN M = 6 7 7 6 4 3 NaN 5 NaN 6 ...

24 Tage ago | 1

| accepted

Answered

how to remove the last column in the matrix?

>> A = [2,4,2,4,2,6,8] A = 2 4 2 4 2 6 8 >> B = A(1:end-1) B = 2 4 2 4 2 6

how to remove the last column in the matrix?

>> A = [2,4,2,4,2,6,8] A = 2 4 2 4 2 6 8 >> B = A(1:end-1) B = 2 4 2 4 2 6

24 Tage ago | 0

| accepted

Answered

Fill an array after a for loop

These two changes make the code run without error: G = zeros(nraw,numel(x)); and G(i,:) = x; Whether it is correct only you ...

Fill an array after a for loop

These two changes make the code run without error: G = zeros(nraw,numel(x)); and G(i,:) = x; Whether it is correct only you ...

24 Tage ago | 0

| accepted

Answered

Convert a vector in Character array after a for loop

Avoiding character manipulations using basic indexing: >> x = [1,2,3,1]; >> V = 'A':'Z'; >> V(x) ans = ABCA

Convert a vector in Character array after a for loop

Avoiding character manipulations using basic indexing: >> x = [1,2,3,1]; >> V = 'A':'Z'; >> V(x) ans = ABCA

25 Tage ago | 0

| accepted

Answered

How to define and store string to matrix or array

With a simple cell array: N = 3; C = cell(1,N); for k = 1:N x = ... your code C{k} = x; end https://www.mathworks...

How to define and store string to matrix or array

With a simple cell array: N = 3; C = cell(1,N); for k = 1:N x = ... your code C{k} = x; end https://www.mathworks...

25 Tage ago | 0

| accepted

Answered

draw a graph from cell arrays

plot((Y{i},position);); % ^ ^^ not valid syntax should be plot(Y{i},position); PS: in future please show th...

draw a graph from cell arrays

plot((Y{i},position);); % ^ ^^ not valid syntax should be plot(Y{i},position); PS: in future please show th...

25 Tage ago | 0

Answered

Round in a cell array that also contains string

idx = cellfun(@isnumeric,C); C(idx) = cellfun(@(x)round(x,N),C(idx),'uni',0)

Round in a cell array that also contains string

idx = cellfun(@isnumeric,C); C(idx) = cellfun(@(x)round(x,N),C(idx),'uni',0)

25 Tage ago | 0

| accepted

Answered

How can I generate random single precision (float32) numbers ?

This generates all possible singles: >> V = ['0':'9','A':'F']; >> X = randi(16,1,8); >> V(X) ans = 7B3A5B5F >> N = typecast...

How can I generate random single precision (float32) numbers ?

This generates all possible singles: >> V = ['0':'9','A':'F']; >> X = randi(16,1,8); >> V(X) ans = 7B3A5B5F >> N = typecast...

25 Tage ago | 1

Answered

Using a Variable inside the name to save a file

fnm = sprintf('date_%s_task.jpg',ID); saveas(gcf,fnm); Note that obtaining and referring to explicit graphics handles is more ...

Using a Variable inside the name to save a file

fnm = sprintf('date_%s_task.jpg',ID); saveas(gcf,fnm); Note that obtaining and referring to explicit graphics handles is more ...

25 Tage ago | 0

Answered

the logical answer is 1

The MATLAB Editor will highlight assignments without a semi-colon: https://www.mathworks.com/help/matlab/matlab_prog/check-code...

the logical answer is 1

The MATLAB Editor will highlight assignments without a semi-colon: https://www.mathworks.com/help/matlab/matlab_prog/check-code...

25 Tage ago | 0

Answered

How to resize a matrix with zeros in between elements

Some general solutions for matrix A of any size. >> A = [10,5;4,10;2,3]; Method one: sub2ind: >> [R,C] = size(A); >> B = zer...

How to resize a matrix with zeros in between elements

Some general solutions for matrix A of any size. >> A = [10,5;4,10;2,3]; Method one: sub2ind: >> [R,C] = size(A); >> B = zer...

25 Tage ago | 2

| accepted

Answered

Transform a 3D dimension array to n 2D matrix

"How can I transform a 3D dimension array (15*781*81) to 15 extracted 781*81 2D matrix to make it feasible to write down them in...

Transform a 3D dimension array to n 2D matrix

"How can I transform a 3D dimension array (15*781*81) to 15 extracted 781*81 2D matrix to make it feasible to write down them in...

25 Tage ago | 0

Answered

how to stop changing of a variable?

Use a nested function: logic = true; ... function ... ... logic = logic && s<200; ... end ... Or a ...

how to stop changing of a variable?

Use a nested function: logic = true; ... function ... ... logic = logic && s<200; ... end ... Or a ...

25 Tage ago | 0

| accepted

Answered

All possible permutation of a given vector.

V = [1,2,3,4,1]; N = numel(V); % Permutations: P = perms(V(2:N)); P(:,N) = V(1); P = unique(P,'rows') % Rotations: R = P;...

All possible permutation of a given vector.

V = [1,2,3,4,1]; N = numel(V); % Permutations: P = perms(V(2:N)); P(:,N) = V(1); P = unique(P,'rows') % Rotations: R = P;...

26 Tage ago | 0

| accepted

Answered

Finding the average of every nth row but n is not fixed.

>> M = [1,10;1,11;1,20;2,4;2,9;2,8;2,8]; Method one: accumarray: >> V = accumarray(M(:,1),M(:,2),[],@mean) V = 13.667 ...

Finding the average of every nth row but n is not fixed.

>> M = [1,10;1,11;1,20;2,4;2,9;2,8;2,8]; Method one: accumarray: >> V = accumarray(M(:,1),M(:,2),[],@mean) V = 13.667 ...

26 Tage ago | 0

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Answered

wildcard in dir command - single char

dir does not support single-character wildcards. You could remove the superfluous filenames afterwards, e.g.: >> S = dir('aaa*...

wildcard in dir command - single char

dir does not support single-character wildcards. You could remove the superfluous filenames afterwards, e.g.: >> S = dir('aaa*...

26 Tage ago | 0

Answered

How to assign few of the array values with a constant randomly .

"How to assign few of the array values with a constant randomly ." >> n = 10; >> m = 4; >> V = zeros(1,n); % generate array ...

How to assign few of the array values with a constant randomly .

"How to assign few of the array values with a constant randomly ." >> n = 10; >> m = 4; >> V = zeros(1,n); % generate array ...

26 Tage ago | 1

| accepted

Answered

Why "undefined variable" error keeps coming when infact the variable is defined?

stats is empty so your loop never runs (i.e. the code inside the loop never runs so those variables are not defined). This occur...

Why "undefined variable" error keeps coming when infact the variable is defined?

stats is empty so your loop never runs (i.e. the code inside the loop never runs so those variables are not defined). This occur...

26 Tage ago | 0