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How to divide a 400x800 matrix to 8x8 blocks?
M = rand(400,800); [R,C] = size(M); C = mat2cell(M,8*ones(1,R/8),8*ones(1,C/8))

2年以上前 | 0

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I have a matrix. I want to count number of only those zeros which are lying between 2 sets of consecutive nonzero values on each side. How to do? Desired result given below
A general solution requires that: the 3rd value should be empty. therefore e.g. a container array needs to be used. Consider ...

2年以上前 | 0

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Increase the number of elements inside a cell
No loop, no concatenation required: A = {'5';'11'}; B = {'7';'19'}; out = [A,B]; % cell 2x2 parameter = 4; out(:,end+1:para...

2年以上前 | 0

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Splitting Table Based on One Column Value
Use the correct type of indexing. Curly braces returns the table content, not another table: https://www.mathworks.com/help/mat...

2年以上前 | 1

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How to extract multiple excel tabs into MATLAB
Do not use deprecated XLSREAD. It is very odd that your filename does not have a file extension, I fixed that for you: F = 'C:...

2年以上前 | 1

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How to create new rows in a table based on nested cell arrays of different sizes
This is MATLAB, so do not use on concatenation within loops to achieve this task. Better: S1 = load('file.mat'); S2 = load('fi...

2年以上前 | 0

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unpack cell array of letters to be plugged into individual-cell rows, in a vector
Why are you storing numeric data as text? That must make data processing very awkward: most likely better data design would be t...

2年以上前 | 1

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Comparing two tables and replacing categorical column, row wise.
Why are you using a loop for this? MATLAB works best when you work in terms of vectors, matrices, and arrays: T1 = array2table(...

2年以上前 | 0

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Need help on the array of matrix.
B = reshape(A,3,[]).'

2年以上前 | 1

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How to add extension to files using MATLAB
According to a comment you made in another thread, the files have no file extension. The first thing is to check if that is real...

2年以上前 | 0

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convert a column matrix with many rows into multiple column of equal rows
A = [1;3;2;4;5;8;7;6;12;10] B = reshape(A,[],2) B = [1,8;3,7;2,6;4,12;5,10]

2年以上前 | 0

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Inquiry about ceil function.
"I understand what ceil function does, however I do not understand why is necessary to sum + 1E-12" In lieu of useful code comm...

2年以上前 | 0

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create matrix (rx1) with the data obtained from the for loop
"Maybe it is because there are numbers in the name field (not in sequence)? I don't think so." Yes, it is exactly because of th...

2年以上前 | 0

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Suppose i have a matrix (2x4) A=[1 2 3 4;5 6 7 8] and i want to change it into this matrix [1 2;3 4;5 6;7 8]. How to do that?
When using MATLAB you will do these kind of things quite often. Understand the order of data stored in memory: https://www.math...

2年以上前 | 0

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combine cells with different size
a = {'ball' , 'cake' , 'ice'}; b = {'home'}; c = {'car','moto'}; d = {'money'}; e = cell(4,0); e(1,1:numel(a)) = a; e(2,1:...

2年以上前 | 0

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only consider fields that exist within a structure
Generally it is easier to keep data together, rather than split it apart. Do not "extract" all of the fields to separate variabl...

2年以上前 | 0

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why readtable create field "D" in the struct "D1"
If there is only one variable in the MAT file (regardless of its extension) and you do not know/care what its name is: C = stru...

2年以上前 | 0

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Dividing a Square Matrix into Four Distinct Matrices Based on indexing element as well as the last digit
Simpler and more efficient. My answer takes into account my comments here. Assumes no zero, negative, fractional, inf, etc. val...

2年以上前 | 1

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Write values of large cell to .inp file
Do not use nested loops! Your approach mixes up nested loops and a format string that prints each line. Better: fmt = repmat(',...

2年以上前 | 0

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how to create for loop in below formula
Your inefficient approach (with anti-pattern numbered variable names): LP1 = rand; LP2 = rand; LP3 = rand; LP4 = rand; LP5 ...

2年以上前 | 0

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Expanding current code to be used on folder of these file types, and changing strings into numbers per file.
Download SIP2NUM from here: https://www.mathworks.com/matlabcentral/fileexchange/53886-scientific-prefix-to-number (this code ...

2年以上前 | 0

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How to plot weeknumbers (integers) in a graph without leaving gaps for weeks that do not exist
This turns out to be surprisingly difficult without DATETIME et al supporting ISO 8601 weeknumbers. The rules for ISO 8601 week...

2年以上前 | 0

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vertcat errors - need a 'workaround' solution
S = load('datatables.mat') T1 = S.C1; T2 = S.R1; C1 = categories(T1.ImpactWind) C2 = categories(T2.ImpactWind) C0 = unique(...

2年以上前 | 0

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export structs within structs
So many nested scalar container arrays: this is very inefficient data design. Much better would be e.g. one non-scalar structure...

2年以上前 | 1

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im struggling with this one guys like the oddsum and the rest is undefeatable with me
N = 'S2307605'; % must be character V = N(2:end)-'0' R = rem(sum(3*V(1:2:end))+sum(V(2:2:end)),11) S = struct('S','A':'K','G'...

2年以上前 | 0

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split struct based on description
C = {S.SeriesDescription}; S_scout = S(strcmpi(C,'Scout')) S_serie = S(strcmpi(C,'Serie')) S_stand = S(strcmpi(C,'Standard'))...

2年以上前 | 0

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select, only once, the names present in a struct
C = unique({S.SeriesDescription}) https://www.mathworks.com/help/matlab/matlab_prog/comma-separated-lists.html https://www.mat...

2年以上前 | 0

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Load data as structure in Matlab App Designer
Here is a simple way to convert the output from UIGETFILE to a non-scalar structure similar to that returned by DIR: [F,P] = ui...

2年以上前 | 0

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create a struct with two columns
"How can I do it?" S = struct([]); for k = 1:7 name_char % = '0001'; folder_char %= 'C\.....'; S(k).name = nam...

2年以上前 | 0

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Read files in a folder with dates on them
The actual solution is to parse the filenames that you gave. Lets create some fake files with fake data: X=1;save Profile_1990_...

2年以上前 | 1

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