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I have a problem with plugging values into array variable
firstday = pm25_var(25,114,1,1:24);

3 years ago | 0

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Answered
how to generate structure member values with only one index data of parent structure .
In lieu of your actually answering my questions here I will presume that both badly-named STRUCT and MEMBER are scalar structure...

3 years ago | 0

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Answered
How can I parse this textfile with textscan? Delimiter \t not working
"At first I thought, each block would be split into cell array of 5 columns if I use delimiter \t. But the result was not what I...

3 years ago | 1

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Answered
column vector from another vector
vertcat(acd3cd8noly{5,1:end})

3 years ago | 0

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Answered
Store all results obtained from a for loop inside a matrix
The simpler MATLAB approach is to use SUB2IND: matrix = [5,6,14,25; 14,55,44,16; 98,65,34,75; 67,89,21,88]; coord = [1,1; 1,3;...

3 years ago | 0

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Answered
import to the workspace a .mat file saved in a folder other than pwd
The recommended approach is to use FULLFILE (and to always LOAD into an output variable): S = load(fullfile(folder,file)) Why ...

3 years ago | 0

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Answered
Why create a 1-by-3 structure array with one field by this way？
"Is it better than this" Not really: both are fragile code and should be avoided. They will both throw errors or produce unexp...

3 years ago | 2

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Answered
How to convert char data to double format?
"The size of the data is [2x72],..." The data you provided is actually a 2x64 char array. "I want to store each element, inclu...

3 years ago | 0

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Solving Matrix Index Problem
The simple and efficient approach is to use MTIMES: M = [1,0,0,0;0,1,0,0;0,2,1,1] % any number of rows V = [0.25;0.1;0.05;0.01...

3 years ago | 0

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Switch Case or if-else?
"Switch statement cannot judge the range of R. It may be possible but it must be very tricky." switch true case R <= 1.2 ...

3 years ago | 1

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Switch not recognizing that 0 is greater than -1
x = 0; switch true case x<-1 y=1 case x<=2 y=x^2 otherwise y=4 end

3 years ago | 0

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How to convert serial number to date number
The CMEMS documentation gives several possible time units, one of them is % julian_day_unit = "days since 1950-01-01 00:00:00" ...

3 years ago | 0

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Reading multiple csv file from multiple folder
P = 'absolute or relative path to the main folder'; S = dir(fullfile(P,'*','*.csv')); for k = 1:numel(S) F = fullfile(S(k...

3 years ago | 0

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Answered
how insert array in field struct
"it's possibile to avoid loop?" Does A already exist or not? Your question does not make this clear... here are both cases: Z ...

3 years ago | 1

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Content of table not fully displayed
It is unclear why you are storing a cell array in a table with only one variable... why not just the cell array? S = load('Slee...

3 years ago | 0

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Answered
I want to know the process of changing the array to table. Too many table variables because there are too many arrays.
The simple solution is to use CELLSTR, which gives ARRAY2TABLE the cell of char vectors that it requires: M = (1:5).'*[1,10,100...

3 years ago | 0

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Cropping and saving images: "unable to perform assignment because the size of the left side is 825-by-1081 and the size of the right side is 450-by-601."
% specify folder with uncropped images P = '/Users/greencrystal19/Documents/MATLAB/numframe'; S = dir(fullfile(P,'*.tif')); %...

3 years ago | 0

Answered
Datetimes in table not displayed
C = {datetime(2021,1,1:2);datetime(2022,2,3:6);datetime(2023,3,7:9)} D = NaT(numel(C),0); for k = 1:numel(C) V = C{k}; ...

3 years ago | 0

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Answered
error "Error in untitled (line 9)"
The ODE45 documentation states that its first input argument must be a function handle: https://www.mathworks.com/help/matlab/r...

3 years ago | 1

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convert arraycell in array string
"it's possibile to convert in string?" Probably. I am guessing that you want something like this: C = {1;[2,34];[56,7,89]} F ...

3 years ago | 0

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Answered
How to rearrange data to a given decreasing rank order
A = [4,20,60,40,5]; X = [1,2,3,5,4]; B = sort(A,'descend'); B = B(X)

3 years ago | 0

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Answered
Extracting only certain data from a matrix
Where M is your matrix: X = M(:,1)==3; B = M(X,:)

3 years ago | 0

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Calculate the average of each matrix block
Here are some simple MATLAB approaches: A = repmat([1,2,3,4,1,2,3,4,1,2,3,4,7,6,5,4],16,1) M = mean(permute(reshape(A,4,4,4,4)...

3 years ago | 0

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Calculating a mean matrix of a cell array
M = mean(cat(3,A{:}),3,'omitnan')

3 years ago | 0

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Answered
Finding files in directory with two different strings in filename
Use FULLFILE rather than concatenating text together. Here is a simple approach that solves the problem you pose in your questi...

3 years ago | 1

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Answered
How to rename identical variables under one common name?
T = readtable('myData.xlsx') T.Type = regexp(T.Type,'^[A-Z]{4}','match','once')

3 years ago | 1

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Answered
Populate a matrix using the elements of some columns of another matrix as index and other as values
" may have multiple values with the same indices. In my case, I need to add the values with the same index" That is exactly wha...

3 years ago | 0

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Answered
Adjusting the datetick issue.
Do not use deprecated DATENUM or serial date numbers or the like. Use DATETIME (and set the format if required): S = load('m_t...

3 years ago | 1

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Why can not the 'save' command store a matrix of single precision into a txt file? Warning: Attempt to write an unsupported data type to an ASCII file. Variable 'AA2' not wri
" What's the reason..." Because venerable SAVE does not really offer much functionality when exporting to text file, due to it ...

3 years ago | 0

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Answered
Format display number into table
You can change the variable viewer format in the options: Preferences -> Variables -> Format -> Default Display Format. You ne...

3 years ago | 0

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