Answered
For loop to create a new matrix taking a cluster of columns from existing matrix
The MATLAB approach using reshape, permute, and sum: inp = randi([1,20],1300,36) out = sum(permute(reshape(inp,1300,4,[]),[1,3...

5 years ago | 1

Answered
How to skip lines after the header line when using readtable
type test.csv opts = detectImportOptions('test.csv'); opts.DataLines = 3; opts.VariableNamesLine = 1; T = readtable('test.cs...

5 years ago | 6

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Answered
Add names to table variables from a large cell
% Fake data: V = {[1,3,4],[4,7,8],[1,2]}; A = randi(9,5,4); % Create table: F = @(n)sprintf("{%s}",join(string(n),",")); T ...

5 years ago | 0

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Answered
Why readtable() function cannot read an xlsx file properly?
This is caused by the different row lengths in sheet 3: the shortest row has just 7 non-blank cells, the longest row has 147 non...

5 years ago | 1

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Answered
how to separate string matrix by zeros
This would have been easier if you had imported the data as numeric, rather than as string. Rather than relying on low-level lo...

5 years ago | 0

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Answered
Create table from structure - alignment
Simpler: mom.a = 1; mom.b = 2; mom.veryLongName = 3; hdr = {'Moment'; 'Value'}; tmp = [fieldnames(mom),struct2cell(mom)].';...

5 years ago | 0

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Answered
Rearranging array based on number of steps.
https://www.mathworks.com/help/matlab/ref/reshape.html https://www.mathworks.com/help/matlab/ref/permute.html A = 1:24; N = 3...

5 years ago | 1

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Answered
How to select a specific element in a table using variables corresponding to table headers
How to select data from a table is explained here: https://www.mathworks.com/help/matlab/matlab_prog/access-data-in-a-table.htm...

5 years ago | 0

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Answered
json char with too many decimals, need removal
str = '{"hund": 0.3253533250000000000000000000000000, "kat": "dfsdfs", "baenkebider": 0.002021203321320000000000000000000000}'; ...

5 years ago | 0

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Answered
How to replace cell values with consecutive values related to their index
Simpler: C = {cell(1,1),cell(1,5),cell(1,3)} N = cellfun(@numel,C); D = mat2cell(1:sum(N),1,N)

5 years ago | 1

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How can I remove . and ..
Replace {sad([sad.isdir]).name} with setdiff({sad([sad.isdir]).name},{'..','.'})

5 years ago | 0

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Answered
Using different functions in a loop
Convert strings-of-function-names to function handles (which they should be anyway): C = {'sin','sqrt','abs'}; C = cellfun(@st...

5 years ago | 0

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Answered
How to convert a long string into desired length variables or cells?
S = "ea3672f1a9012345"; V1 = sscanf(S,'%1x') V2 = sscanf(S,'%8x')

5 years ago | 1

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Answered
How can I find indices?
A = [1,2,3,3,1,1,2,1;1,1,1,2,2,3,2,3] B = [2,1;1,3] [~,X] = ismember(B.',A.','rows')

5 years ago | 0

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Answered
Reading Text file and converting values to variables (*not in matrix form*)
P = 'absolute or relative path to where the file is saved'; S = fileread(fullfile(P,'output.txt')); F = @(t)sscanf(regexprep(S...

5 years ago | 2

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Answered
How can i name the column on a table ?
You created a table with one variable and one row, and that variable contains a large numeric matrix. This is not useful for you...

5 years ago | 0

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Answered
How to assign the values to a matrix?
https://www.mathworks.com/help/matlab/ref/sub2ind.html B = [1,9,12,31]; C = [1,4;3,6;5,2;6,3] A = zeros(6,6); % assign those...

5 years ago | 0

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Answered
Reading CSV as Structure Array
T = readtable('Test_Expression.csv', 'Decimal',',', 'Delimiter',';') S = struct('gene',{T.gene}, 'value',T.value) S.rawValue =...

5 years ago | 0

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Answered
element wise operation column matrix
T = [20;27;29;33;40]; A = T - T(1) B = [0;diff(T)]

5 years ago | 0

Answered
Extract arrays from cell with order in a for loop
B = A; for k = 1:numel(A) array_to_crop = A{k}; array_cropped = array_to_crop(5:22,1); %Cropping selected array ...

5 years ago | 0

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Answered
How to create corresponding equation in a column based on the value of previous column? (Similar to drag in Excel)
The MATLAB approach would be to use logical indexing: https://www.mathworks.com/help/matlab/math/array-indexing.html For examp...

5 years ago | 0

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Answered
Read all .csv file in Folder , rearrange and write in one .csv file
P = 'absolute or relative path to where the files are saved'; N = 150; C1 = cell(1,N); C2 = cell(1,N); for k = 1:N F = ...

5 years ago | 0

Answered
Trying to find row numbers from array inside cell array entry
T = readtable('Text1 1-10.txt', 'Delimiter','\t') https://www.mathworks.com/help/matlab/matlab_prog/access-data-in-a-table.html...

5 years ago | 0

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Answered
Changing the variable names for multiple tables within a loop that imports the data
Using eval is a misdirection that forces you into writing slow, inefficient, complex code: https://www.mathworks.com/matlabcent...

5 years ago | 0

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Answered
Second derivative of a function handle
Tip for beginners: whenever you use EVAL you are doing something wrong. With symbolic variables you do not need to define anony...

5 years ago | 0

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Answered
The logical indices contain a true value outside of the array bounds
As the error states, your logical indexing includes a TRUE value outside the size of that array. Compare: V = randi(9,1,3) X =...

5 years ago | 1

Answered
How to create empty indexes when not available?
data = [2,3,4,5,3,2,4,5]; x = 5; n = 10; p = 2; window = data(max(1,x-n):min(end,x+p)) Are the NaNs really required?

5 years ago | 0

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Answered
I need help preallocating an array of position vectors
Use a cell array: tmpout = cell(1,stack_size(4)) for frame_no = 1:stack_size(4) .. tmpout{frame_no} = pos; end mat...

5 years ago | 1

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Answered
Naming new directories sequentially
N = number of directories P = 'absolute/relative path to the parent directory'; for k = 1:N D = sprintf('Prefix_%03d',k);...

5 years ago | 0

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Answered
accessing multiple individual struct field values
S(1).data = [1;2;3]; S(2).data = [4;5;6]; S(3).data = [7;8;9]; n = 2; V = arrayfun(@(s)s.data(n),S) or (assuming that each ...

5 years ago | 0