Answered

help using bsxfun to multiplay different size matrixes

tmp = bsxfun(@times, norm_mode, reshape(fields(:,3),1,1,[]))

help using bsxfun to multiplay different size matrixes

tmp = bsxfun(@times, norm_mode, reshape(fields(:,3),1,1,[]))

5 months ago | 0

| accepted

Answered

Bar() very thin, does not respond to width argument

"I have a problem with Bar() function" No, you have a problem with ZEROS() function. In particular you have only specified ZERO...

Bar() very thin, does not respond to width argument

"I have a problem with Bar() function" No, you have a problem with ZEROS() function. In particular you have only specified ZERO...

5 months ago | 0

| accepted

Answered

How to validate that one datetime is greater than another

Do NOT convert to low-precision serial date numbers! Avoid deprecated DATENUM ! Argument validation lets you define your own va...

How to validate that one datetime is greater than another

Do NOT convert to low-precision serial date numbers! Avoid deprecated DATENUM ! Argument validation lets you define your own va...

5 months ago | 1

| accepted

Answered

Matrix does not want to multiply and gives an error when I multiply a 3x3 matrix with a 3x1 matrix

Read the INV documentation! And then use the recommended function MLDIVIDE: A = [9, 29.3, 140.99; 29.3, 140.99,827.693; 140.99,...

Matrix does not want to multiply and gives an error when I multiply a 3x3 matrix with a 3x1 matrix

Read the INV documentation! And then use the recommended function MLDIVIDE: A = [9, 29.3, 140.99; 29.3, 140.99,827.693; 140.99,...

5 months ago | 0

Answered

alternative of inline function

If you want a derivative, why are you using a function handle? Using symbolic toolbox would be simpler: syms x f = x^2-2*x g ...

alternative of inline function

If you want a derivative, why are you using a function handle? Using symbolic toolbox would be simpler: syms x f = x^2-2*x g ...

5 months ago | 1

| accepted

Answered

Find minimum values based on unique number

P = load('matlab.mat').Prof_temp S = groupsummary(P,"Profile_num","min","Temp") plot(S.Profile_num,S.min_Temp)

Find minimum values based on unique number

P = load('matlab.mat').Prof_temp S = groupsummary(P,"Profile_num","min","Temp") plot(S.Profile_num,S.min_Temp)

5 months ago | 0

Answered

Spli cell array directly at the function output

If you can modify the function to return another output argument the size of the returned cell arrays is only known when they ...

Spli cell array directly at the function output

If you can modify the function to return another output argument the size of the returned cell arrays is only known when they ...

5 months ago | 0

Answered

How to fix loop which over the determined index ?

"Hi guys, im trying to do looping ii 1:900 but why when u run it, it was never-ending loop." I already told you the reason why,...

How to fix loop which over the determined index ?

"Hi guys, im trying to do looping ii 1:900 but why when u run it, it was never-ending loop." I already told you the reason why,...

5 months ago | 0

Answered

Duration type doesn't preserve seconds accuracy

"Duration type doesn't preserve seconds accuracy" That is exactly what CALENDARDURATION objects are for: format longg dt1 = d...

Duration type doesn't preserve seconds accuracy

"Duration type doesn't preserve seconds accuracy" That is exactly what CALENDARDURATION objects are for: format longg dt1 = d...

5 months ago | 0

Answered

Find min and max in groups

A = [12, 11, 12, 5, 3, 10, 5]; B = [0.1, 0.1, 0.1, 0.7, 0.4, 0.3, 0.2]; X = 1:numel(A); Fmax = @(x){x(max(B(x))==B(x))}; Fmi...

Find min and max in groups

A = [12, 11, 12, 5, 3, 10, 5]; B = [0.1, 0.1, 0.1, 0.7, 0.4, 0.3, 0.2]; X = 1:numel(A); Fmax = @(x){x(max(B(x))==B(x))}; Fmi...

5 months ago | 0

| accepted

Answered

Use save function with '-fromstruct' option to save a cell array

As the error message states, the structure must be scalar: test_file = 'test.mat'; files = {'test1.m', 'test2.m'}; T = ones(1...

Use save function with '-fromstruct' option to save a cell array

As the error message states, the structure must be scalar: test_file = 'test.mat'; files = {'test1.m', 'test2.m'}; T = ones(1...

5 months ago | 2

| accepted

Answered

How to write to csv file in shortG format?

Here is one approach that gives exactly the shortG format in your CSV file: format long G M = rand(3,5); M(1) = -6.0247123456...

How to write to csv file in shortG format?

Here is one approach that gives exactly the shortG format in your CSV file: format long G M = rand(3,5); M(1) = -6.0247123456...

5 months ago | 1

| accepted

Answered

I need help with an error I get

Perhaps the input argument should be F (not f): function [posicao, velocidade, aceleracao] = atleta(t, F, M)

I need help with an error I get

Perhaps the input argument should be F (not f): function [posicao, velocidade, aceleracao] = atleta(t, F, M)

5 months ago | 1

| accepted

Answered

When multiplying or dividing a vector by a scaler, when do you need a period before the operator?

"When multiplying or dividing a vector by a scaler, when do you need a period before the operator?" Lets consider multiplying. ...

When multiplying or dividing a vector by a scaler, when do you need a period before the operator?

"When multiplying or dividing a vector by a scaler, when do you need a period before the operator?" Lets consider multiplying. ...

5 months ago | 0

Answered

Observations being read as number of columns instead of rows

Perhaps because the data are (complex conjugate) transposed here: 'ValidationData', {stan_x_val', stan_y_val'}, Note that yo...

Observations being read as number of columns instead of rows

Perhaps because the data are (complex conjugate) transposed here: 'ValidationData', {stan_x_val', stan_y_val'}, Note that yo...

5 months ago | 1

| accepted

Answered

Need help figuring out why this nested function is not working

"File not found" You are not providing FOPEN and READMATRIX with the filepath, so they cannot find the file on your computer. P...

Need help figuring out why this nested function is not working

"File not found" You are not providing FOPEN and READMATRIX with the filepath, so they cannot find the file on your computer. P...

5 months ago | 0

| accepted

Answered

Can't seem to replace values in matrix meeting criteria, although the correct row,col coordinates are found

Use SUB2IND: idx = sub2ind(size(img),row,col); img(idx) = 1; The section "Indexing Matrices with Two Subscripts" here: https...

Can't seem to replace values in matrix meeting criteria, although the correct row,col coordinates are found

Use SUB2IND: idx = sub2ind(size(img),row,col); img(idx) = 1; The section "Indexing Matrices with Two Subscripts" here: https...

5 months ago | 0

| accepted

Answered

Compare two files and remove any lines in the second file when they match values found in the first file

lines1 = [1,2,3,4;2,4,6,7;2,5,7,8;6,7,4,6] lines2 = [2,4,6,7;2,5,7,8] out = setdiff(lines1,lines2,'rows')

Compare two files and remove any lines in the second file when they match values found in the first file

lines1 = [1,2,3,4;2,4,6,7;2,5,7,8;6,7,4,6] lines2 = [2,4,6,7;2,5,7,8] out = setdiff(lines1,lines2,'rows')

5 months ago | 0

| accepted

Answered

A more efficient or compact way to sort strings that contain dates

a = [... '123_abc_01_202403020000_202403022359.txt'; '123_abc_01_202403040000_202403042359.txt'; '123_abc_01_2024...

A more efficient or compact way to sort strings that contain dates

a = [... '123_abc_01_202403020000_202403022359.txt'; '123_abc_01_202403040000_202403042359.txt'; '123_abc_01_2024...

5 months ago | 1

| accepted

Answered

Portion of code containing my custom functions is hidden and I cant access it.

The feature is called code folding: https://www.mathworks.com/help/matlab/matlab_prog/edit-and-format-code.html#brazeg3-1 http...

Portion of code containing my custom functions is hidden and I cant access it.

The feature is called code folding: https://www.mathworks.com/help/matlab/matlab_prog/edit-and-format-code.html#brazeg3-1 http...

5 months ago | 1

Answered

How can I access the value of a string variable? I need to construct a file path from a string variable, but keep getting the variable name and not the string.

It works perfectly, exactly as you showed in your question: directory_name = "directory1"; f = fullfile('/Users/me/ch4', direc...

How can I access the value of a string variable? I need to construct a file path from a string variable, but keep getting the variable name and not the string.

It works perfectly, exactly as you showed in your question: directory_name = "directory1"; f = fullfile('/Users/me/ch4', direc...

5 months ago | 1

Answered

Appending data when extracting nested fields as individual variables

The simple and efficient MATLAB approach using two comma-separated lists (no loops are required!): first100 = load('frames.mat'...

Appending data when extracting nested fields as individual variables

The simple and efficient MATLAB approach using two comma-separated lists (no loops are required!): first100 = load('frames.mat'...

5 months ago | 0

| accepted

Submitted

Natural-Order Filename Sort

Alphanumeric sort of filenames or filepaths, with customizable number format.

5 months ago | 262 downloads |

Submitted

Natural-Order Row Sort

Alphanumeric row sort of a cell/string/categorical/table array, with customizable number format.

5 months ago | 15 downloads |

Submitted

Customizable Natural-Order Sort

Alphanumeric sort of a cell/string/categorical array, with customizable number format.

5 months ago | 27 downloads |

Submitted

Custom List / Arbitrary Sequence Sort

Sort a text array into the order of custom lists / arbitrary text sequences. Sort words with Latin-, Greek-, and Cyrillic-based ...

5 months ago | 2 downloads |

Answered

char array to numeric array

"I was wondering if there was a better way of doing this?" Of course, use READTABLE (or READMATRIX): unzip tab_file_table.zip ...

char array to numeric array

"I was wondering if there was a better way of doing this?" Of course, use READTABLE (or READMATRIX): unzip tab_file_table.zip ...

5 months ago | 0

| accepted

Answered

I'm trying to convert the text into binary and then i want to make the 4 bits chunks.

message = 'Hello world'; A = dec2bin(message, 8) B = reshape(A.',1,[])

I'm trying to convert the text into binary and then i want to make the 4 bits chunks.

message = 'Hello world'; A = dec2bin(message, 8) B = reshape(A.',1,[])

6 months ago | 0

Answered

How to stop double printing text using sprintf ?

Problems: 1- This is the relevant code: VariantModel = compose('%d', 1:height(VariantIDPassed)); .. writefile(VariantModel{i...

How to stop double printing text using sprintf ?

Problems: 1- This is the relevant code: VariantModel = compose('%d', 1:height(VariantIDPassed)); .. writefile(VariantModel{i...

6 months ago | 0

| accepted

Answered

How do I fix my Nan issue within a recursive function?

Replace this (which returns logical indices): FirstID = M==-1; with this (which returns the linear index): FirstID = find(M==...

How do I fix my Nan issue within a recursive function?

Replace this (which returns logical indices): FirstID = M==-1; with this (which returns the linear index): FirstID = find(M==...

6 months ago | 0