Answered
how to arrange vector to matrix?
x = [1,2,3,4,5,6]; m = hankel(x(1:4),x([4:6,1:3]))

4 years ago | 1

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Answered
textscan only reads first row of text file
fmt = 'Time%dG in body frame%f%f%fOmega%f%f%fr balane%f%f%fquat%f%f%f%fMag%f%f%f%f%f%f%f'; opt = {'Delimiter',{';',':',' '}, 'M...

4 years ago | 1

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Answered
Fill a vector with specific values from a matrix
a = [1,4,23,5;5,2,7,8;3,4,6,3]; b = a(a>4)

4 years ago | 1

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Answered
Input A of class cell and input B of class cell must be cell arrays of character vectors, unless one is a character vector.
Why are you inefficiently storing scalar numerics in cell arrays? Using numeric arrays would be much simpler and avoid this err...

4 years ago | 0

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Answered
Replacing Values of one matrix with another
isn_east = isnan(east); or simply: VV = Reference_E; VV(isnan(east)) = NaN;

4 years ago | 0

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Answered
Conversion of feet.inch to meter
Rather than abusing the definition of decimal numbers, a much better way to store feet and inches is in a matrix: FI = [6,5;5,9...

4 years ago | 1

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Answered
Why does the modulo function seem to break for large numbers?
You used a binary floating point number whose precision is limited to around 15-16 significant decimal digits. The output of MO...

4 years ago | 2

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Answered
Interleaved repmat (row duplication)
The simple and efficient approach is to use REPELEM: a = [1,0,0;0,0,1;1,1,1] b = repelem(a,2,1)

4 years ago | 2

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Answered
How to index into a table with more than 1 variable?
Where T is your table (do NOT use table as a variable name): out = T(ismember(T.name,a),:);

4 years ago | 0

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Answered
Is there any way to print values to more decimal places using fprintf?
As the FPRINTF documentation explains, you can specify the number of decimal digits: est = pi; fprintf('The value claculated f...

4 years ago | 0

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Answered
Shorten description of multiple fields and values in struct
Either use CELL2STRUCT: % Fake data: Varnames = cellstr("X"+(1:18)); VarDec = randi(9,5,3,18); % Convert to struct: C = num...

4 years ago | 1

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Answered
replace values in char array if conditions are met
C = {'00','15','30','45','00','15','30','45'}; V = str2double(C)/60; V = V+cumsum([0,diff(V)<0])

4 years ago | 0

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Turning 2D array (58x23) into 4D array (58x1x23x1)
"I can't get any further than the above dimensions" It is not clear what the problem is: are you expecting trailing singleton d...

4 years ago | 1

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Answered
How to check if a variable exists and if yes display the variable.
"Why can't I check if this exists?" Of course you can, you just need to use function syntax and not command syntax: https://ww...

4 years ago | 2

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Replace negative values with zero and values above 1 with 1, using loop in a 8760 x 1000 matrix
Much simpler and more efficient than using loops, where A is your array: ltz = sum(A<0,1); gto = sum(A>1,1); B = max(0,min(1,...

4 years ago | 3

Answered
Common substring index from two string arrays
a = ["frame01", "frame02", "frame03"]; b = ["capture00.jpg", "capture01.jpg", "capture02.jpg", "capture03.jpg", "capture04.jpg"...

4 years ago | 0

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Answered
less than against less or equal than
"Can someone tell me what is going on" Exactly as the comparison tells you, the value stored in that variable is greater than t...

4 years ago | 0

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Answered
Array prealocation - Extra array of zeros in 3D array
windows3D = nan(2000,5147,0); or use actual preallocation: N = size(eegDataNorm,1); windows3D = zeros(2000,5147,N); for k = ...

4 years ago | 0

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Answered
How to convert a char array field in a struct array to a string field in a vectorized fashion.
S = struct('code',{'CO128','TX457'}); S.code % checking tmp = num2cell(string({S.code})); [S.code] = tmp{:}; S.code % checki...

4 years ago | 1

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Answered
Create a matrix using rand function with a value range
0.004*rand(50,50)

4 years ago | 1

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Answered
for loops and storing values
"what can i do to solve this?" Use indexing into a preallocated array: c = nan(46,4); % <--- preallocate! for h = 1:23 f...

4 years ago | 1

Answered
I am getting error
You need to use array operations, not matrix operations (you missed this for multiplication): https://www.mathworks.com/help/ma...

4 years ago | 0

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Error with matrix "Error using vertcat" Dimensions of arrays being concatenated are not consistent.
The problems are on these lines: 0 0 0 0 -1 0 1 0 0 mp*AG4x-Fp4x(1,i) 0 0 0 0 0 -1 0 1 0 mp*AG4y-Fp4y(1,i) Because AG4x and A...

4 years ago | 0

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Answered
How to normalize only one column of a matrix
normalize(X(:,2),'range',[0,1]) or simply rescale(X(:,2)) If you want to replace the data in the matrix then allocate the fun...

4 years ago | 0

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Answered
I need to write a code to import multiple csv files, changing delimiter and decimal standard...
Use READMATRIX and set the Delimiter and DecimalSeparator to values that suit your file.

4 years ago | 0

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Answered
merging workspace from different .mat files
"I think the problem ive run into is my files contain the same variable names..." That is not a problem at all, actually that i...

4 years ago | 0

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Answered
Why doesn't this function declaration work?
You are missing a closing parenthesis here: concentrations(n-i-1) = maxconc*(1/factor^(i-1); % ...

4 years ago | 1

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Answered
Using sprintf to match the results of format
Introduced in R2021a: https://www.mathworks.com/help/matlab/ref/formatteddisplaytext.html format short str = strtrim(formatted...

4 years ago | 1

Answered
How to code with for loop loops without using ndgrid?
As this is clearly homework, this should get you started: inp = {1:2, 3:4, 5:6}; [A,B,C] = ndgrid(inp{:}); A1=reshape(A,[],1)...

4 years ago | 1

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Expected Behavior for contains()?
Exactly as its documentation explains, CONTAINS returns a logical TRUE where pat (second input) is found anywhere within the str...

4 years ago | 0

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