Stephen23

Active since 2014

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Answered
Epoch time conversion using datetime function
Your value is in milliseconds (not seconds, as is standard for Unix time), so either divide the value by 1000: opt = {'Format',...

alrededor de 17 horas ago | 0

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Answered
How to read images sequentially from a folder?
You can download the file NATSORTFILE by clicking the big blue download button here: https://www.mathworks.com/matlabcentral/fi...

alrededor de 18 horas ago | 0

Submitted

Maximally Distinct Color Generator
Generate maximally distinct colors in an RGB colormap.

4 días ago | 31 downloads |

Answered
Given a long (50-2000 each set in scientific notation ex. +1.394013E-10) string of multiple numbers, how can I convert it to an array quickly.
The very efficient approach is to use SSCANF: str = "+1.362134E-10,+1.381140E-10,+1.397078E-10,+1.401982E-10,+1.400756E-10,+1.4...

4 días ago | 0

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Answered
textscan to read date and time column and numeric data together
T = readtable('WHP-SEA-TP116-HS417-S1.csv', 'NumHeaderLines',66)

5 días ago | 0

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Answered
Create Structure from cell array with dot separation in string
You can use SETFIELD() with a comma-separated list: V = pi; T = 'em1500.eta_t.x'; C = split(T,'.'); S = struct(); S = setfi...

5 días ago | 0

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Answered
file list when "dir" to import data
"How can I make the "liste" to have the sequentially increasing number in the name?" If you cannot change the filenames to use ...

6 días ago | 0

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Answered
How do i get multiple values all at once from cell array?
"... for loop(cause they are slow)" A well-written loop will be fast enough, e.g. where C is your cell array and assuming that ...

7 días ago | 0

Answered
converting csv timestamp to datetime on import
type test.csv T = readtable('test.csv','Format','%{M/d/y}D%T%d','Delimiter',{',',' '}) D = T.Var1 + T.Var2 + milliseconds(T.Va...

7 días ago | 0

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Answered
how to do the addition of the cell matrix ?
The simple and efficient MATLAB approach is to use SUM(): val = cat(3,[0,67.5000,0,67.5000,0;0,67.5000,0,67.5000,0],[79.3333,0,...

8 días ago | 0

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Answered
Strange behaviour: struct with cell values
"Strange behaviour: struct with cell values" The STRUCT() documentation explains what happens with cell array inputs: "... if v...

9 días ago | 0

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Answered
Sorting table row variables with number and letters
Your question and examples are confusing: sometimes you show that you want to sort RowNames, and sometimes that you want to sort...

11 días ago | 0

Answered
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"; ...

12 días ago | 0

Answered
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) ...

13 días ago | 1

Answered
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...

14 días ago | 1

Answered
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...

14 días ago | 0

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Answered
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

14 días ago | 0

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Answered
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...

14 días ago | 0

Answered
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 ...

14 días ago | 0

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Answered
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, ...

15 días ago | 0

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Answered
Cell2mat with different rows
Download https://www.mathworks.com/matlabcentral/fileexchange/22909-padcat and use it like this: S = load('Cell.mat') A = S.A ...

15 días ago | 1

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Answered
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...

15 días ago | 0

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Answered
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...

15 días ago | 0

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Answered
MATLAB output is a bunch of numbers with operators not the exact number
double(A)

16 días ago | 0

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Answered
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,:);

16 días ago | 0

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Answered
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...

17 días ago | 0

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Answered
"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...

18 días ago | 0

Answered
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))

19 días ago | 2

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Answered
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...

19 días ago | 1

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Answered
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; ...

19 días ago | 0

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