Community Profile # Stephen23

Active since 2014

Suspensa Vix Via Fit

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Sort according to specific string contained in file name
S = ["D:\DATA\XY\Project_XY\label_sPR12345_AB67890-0011.nii"; "D:\DATA\XY\Project_XY\label_sPR40922_AB03091-0011.nii"; ...

10 hours ago | 0

Why am i getting this error 'unrecognized function or variable' for the defined function itself
clc % <---------- !!!!!!!!!!!!!!!!!! DELETE THIS LINE !!!!!!!!!!!!!!!! % <- and this line too function MM = po(conc,p,k) ...

2 days ago | 1

How could I program a "for loop" in Matlab to calculate the function's minimum value?
X = [1,2,3,4,5]; Y = nan(size(X)); for k = 1:numel(X) b = X(k); G = @(x) x.^2 - b.*x + 1; Y(k) = fminbnd(G,0,10...

2 days ago | 1

How to use "contains" statement to detect a string without ambiguity?
"Can you help me to solve this issue?" CONTAINS() check if the pattern occurs anywhere inside the string, but this could be a s...

2 days ago | 0

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How to round numbers to specific near point?
A = [6.1;6.04;5.98;5.92;5.86;5.8;5.74;5.69;5.63;5.57;5.52;5.46;5.41] N = 0.05; B = round(A/N)*N

3 days ago | 0

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What is the orthodox precedure of evaluating/determining the type of a distribution? And How to fit it into a normal distribution with skewness and kurtosis?
The standard appraoch is to use a quantile-quantile plot: https://en.wikipedia.org/wiki/Q%E2%80%93Q_plot which you can do in M...

3 days ago | 0

Results of math with integer
"I tought using integer math tells that if we woukd result in a non integer result, the non integer part gets truncated:" What ...

3 days ago | 0

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Multiple outputs from a for loop
Rather than distracting with anti-pattern numbered variables (like you asked about), instead you should just use basic, normal, ...

4 days ago | 0

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Cell2mat with different rows

4 days ago | 1

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How to change each column of data in a matrix into a comma expression in an elegant and efficient way?
" I want to directly convert the above matrix A to table type" ARRAY2TABLE() "I can't find a function in matlab that can conve...

4 days ago | 0

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Remove single quotes around numeric vector
"Do I have to use another function rather than sprintf?" Get rid of SPRINTF(), converting to character does not help you: Rang...

4 days ago | 0

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Processing large matrix faster
Why are you using a loop? Use logical indexing: M = readmatrix('Bathymetry_Data.txt'); X = M(:,3)<(-80); coods = M(X,:);

5 days ago | 0

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How to get original values from cumulative sum values?
X = rand(1,9) Y = cumsum(X) Z = [Y(1),diff(Y)] max(X-Z) % alomsot zero Because of the accumulated floating point error getti...

6 days ago | 0

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"if sum" (how operator "sum" is possible next to "if"...?)
"Next to "if", there should be logic operator" The IF documentation actually states that it must be an expression. It also stat...

7 days ago | 0

How can I add an index value to an array value?
M = [0.1,0.1,0.1,0.1;0.2,0.2,0.2,0.2;0.1,0.2,0.3,0.4] M = M + (1:size(M,2))

7 days ago | 2

All tables being vertically concatenated must have the same number of variables.
It is not clear to me why you want/need a table anyway. Why not simply concatenate that variable directly?: prm = 'DisplayLengt...

8 days ago | 1

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How to load intermediate variable into workspace while using ode45 ?
Here is the neat, easy, robust approach which returns exactly the a values at the exact t and x output values: tspan = 1:100; ...

8 days ago | 0

use eval to define a variable from table and a name stored as cell
EVAL is anti-pattern red-herring. Avoid EVAL. The actual solution is to use the methods shown in the MATLAB documentation: htt...

8 days ago | 1

How the change the dimensions of multiple arrays with the cell, Matlab?
a = cellfun(@transpose,a,'uni',0)

9 days ago | 0

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How can I use a colormap to color each row in a matrix the same color?
You need to transpose the input matrices, so that PLOT() gets 300*25 matrices: colororder(parula(25)) plot(lon.',lat.','Marker...

9 days ago | 1

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For loop to make an array from workspace variables
Much much better approach: rather than messing about with ugly EVAL, you should always LOAD() into an output variable (which is ...

11 days ago | 2

Casting a number into a categorical array
x = categorical({'one','two','three'}) c = categories(x) y = setcats(categorical({'two','two','three'}),c) d = categories(y) ...

11 days ago | 0

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How to save tables as .mat files without having to type the filename manually?
The solution is to use function syntax, not command syntax: https://www.mathworks.com/help/matlab/matlab_prog/command-vs-functi...

13 days ago | 0

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Get number from a string
B = 'α -0.966 ° OK 4.000 -15.000 ° 23.000 ° Freiwinkel' C = regexp(B,'[-+]?\d+\.?\d*', 'match') V = str2double(C)

15 days ago | 0

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How to find the index of the first element which is greater than a particular value in a matrix for all the columns.
N = 5; M = randi(9,5,7) Method one: CUMSUM and FIND: X = M>N; X = X & cumsum(X,1)<2; [R,~] = find(X) Method two: FIND and ...

15 days ago | 1

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Strings are converted to cells during readtable
The simple solution is to specify the TEXTTYPE option when importing: data = table("string1", "string2"); writetable(data, "da...

15 days ago | 2

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Local functions are not working in MatLab R2022a
"I select it all and press F9." That will not work. You need to run the script by calling it by name from the command line: >...

15 days ago | 1

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fprintf within a for / if environment with crazy behaviour
The file is opened with fopen(fileID,'wt')" Perhaps, but in any case, you did not provide the file identifier to FPRINTF. "Wha...

16 days ago | 2

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