Answered

How to create an empty array to be filled?

Ma is a 0x0 empty vector: Ma = [] Ma = [] You can't multiply your 1x100 vector A by that using element by e...

How to create an empty array to be filled?

Ma is a 0x0 empty vector: Ma = [] Ma = [] You can't multiply your 1x100 vector A by that using element by e...

15 dagar ago | 0

Answered

how to load a function in AppDesigner?

Seems to me that the warning is warning you against loading data into the workspace without controlling the variable names. Try...

how to load a function in AppDesigner?

Seems to me that the warning is warning you against loading data into the workspace without controlling the variable names. Try...

15 dagar ago | 0

| accepted

Answered

split a 2d matrix and create new 3d matrix from the results of the 2d matrix

If I got it right Matrix_T_A = repmat(reshape(T_A', 1, size(x, 2), size(x,1)), 24, 1, 1)

split a 2d matrix and create new 3d matrix from the results of the 2d matrix

If I got it right Matrix_T_A = repmat(reshape(T_A', 1, size(x, 2), size(x,1)), 24, 1, 1)

28 dagar ago | 0

Answered

Plotting random points on a circle

Assuming you mean inside the circle and not on that circle, because then obviously the distance is 500 Anyway, it is much easie...

Plotting random points on a circle

Assuming you mean inside the circle and not on that circle, because then obviously the distance is 500 Anyway, it is much easie...

28 dagar ago | 0

| accepted

Answered

Find a word in a file then pick the value next to it

You've got the right idea. Regular expressions can be confusing at times I tested the regexp, the rest of the code is not teste...

Find a word in a file then pick the value next to it

You've got the right idea. Regular expressions can be confusing at times I tested the regexp, the rest of the code is not teste...

28 dagar ago | 1

Answered

Custom Object property save/load problem

It seems to me that you are saving a 3 column table to the .mat file, then when you load it again, it uses the property to set i...

Custom Object property save/load problem

It seems to me that you are saving a 3 column table to the .mat file, then when you load it again, it uses the property to set i...

ungefär 2 månader ago | 0

| accepted

Answered

How can read 30 text data files in matlab ?

you can alwsay put all of them in a single directory, then use dir to get all file names and iterate through all of them: path ...

How can read 30 text data files in matlab ?

you can alwsay put all of them in a single directory, then use dir to get all file names and iterate through all of them: path ...

3 månader ago | 0

Answered

How to add a sequential number in a column of tables cell?

for i = 1:numel(Test) t = Test{i}; t.gridded_model = strcat(t.gridded_model, '_', num2str(i)); Test{i} = t; end

How to add a sequential number in a column of tables cell?

for i = 1:numel(Test) t = Test{i}; t.gridded_model = strcat(t.gridded_model, '_', num2str(i)); Test{i} = t; end

4 månader ago | 1

| accepted

Answered

Text file has headers that are 2X4 and are repeated randomly within the data.

str = fileread('MCT_Data.txt'); nums = cellfun(@str2double, regexp(str, '([\d.,]+)', 'match')); x = reshape(nums, 4, [])' x...

Text file has headers that are 2X4 and are repeated randomly within the data.

str = fileread('MCT_Data.txt'); nums = cellfun(@str2double, regexp(str, '([\d.,]+)', 'match')); x = reshape(nums, 4, [])' x...

4 månader ago | 0

| accepted

Answered

Converting all arrays inside a cell to tables

c = repmat({(1:10)'}, 3,3) c = 3×3 cell array Columns 1 through 2 {10×1 double} {10×1 double} {1...

Converting all arrays inside a cell to tables

c = repmat({(1:10)'}, 3,3) c = 3×3 cell array Columns 1 through 2 {10×1 double} {10×1 double} {1...

4 månader ago | 1

Answered

Error with find function in a for loop

Find accepts a logical vector and returns all the indices containing 1. The problem is you are giving find a scalar value so...

Error with find function in a for loop

Find accepts a logical vector and returns all the indices containing 1. The problem is you are giving find a scalar value so...

4 månader ago | 1

| accepted

Answered

How to plot colorbar as seperate image?

I assume your image is grayscale, right? If I understand you correctly: min_val=min(example_img(:)); max_val=max(example_img...

How to plot colorbar as seperate image?

I assume your image is grayscale, right? If I understand you correctly: min_val=min(example_img(:)); max_val=max(example_img...

4 månader ago | 1

| accepted

Answered

How to return no output in a function with output?

output variables, the same as input variables, are optional You can choose to return one, both or neither of your outputs. In ...

How to return no output in a function with output?

output variables, the same as input variables, are optional You can choose to return one, both or neither of your outputs. In ...

5 månader ago | 0

Answered

Can I run MATLAB code on a server?

I think this may be what you are looking for https://www.mathworks.com/help/compiler/webapps/install-matlab-web-app-server.html...

Can I run MATLAB code on a server?

I think this may be what you are looking for https://www.mathworks.com/help/compiler/webapps/install-matlab-web-app-server.html...

5 månader ago | 0

Answered

app designer private and public properties?

If these functions are methods of your app, you can use private properties from within these methods, but if they are functions ...

app designer private and public properties?

If these functions are methods of your app, you can use private properties from within these methods, but if they are functions ...

5 månader ago | 0

| accepted

Answered

Group cells in a matrix per column based on an indexed starting point

you can map the ends of each series of ones using diff: C = [diff(B, 1, 1) == -1; B(end, :)]; then check each occurence of C ...

Group cells in a matrix per column based on an indexed starting point

you can map the ends of each series of ones using diff: C = [diff(B, 1, 1) == -1; B(end, :)]; then check each occurence of C ...

5 månader ago | 0

Answered

Best practice for updating default parameter values inside a function, preferably with struct

Using assignin as your configuration strategy is a bad idea not only due to bad performance. It's also very prone to bugs. lets ...

Best practice for updating default parameter values inside a function, preferably with struct

Using assignin as your configuration strategy is a bad idea not only due to bad performance. It's also very prone to bugs. lets ...

5 månader ago | 1

| accepted

Answered

Cross tabulation row percentages

How about something like that? t{:,{'sale1','sale2'}} = t{:,{'sale1','sale2'}}./t.totalsales * 100 Given that t is your ...

Cross tabulation row percentages

How about something like that? t{:,{'sale1','sale2'}} = t{:,{'sale1','sale2'}}./t.totalsales * 100 Given that t is your ...

5 månader ago | 0

| accepted

Answered

Help me about my error on index in position 2 exceeds array bounds (must not exceed 800).

I have no idea what rm and cm are, but at some iteration y=(j-1)*8 + 8 is greater than the number of columns in your matrix u...

Help me about my error on index in position 2 exceeds array bounds (must not exceed 800).

I have no idea what rm and cm are, but at some iteration y=(j-1)*8 + 8 is greater than the number of columns in your matrix u...

5 månader ago | 0

Answered

How do I determine which row my value change significantly

Im assuming its roughly 375 and not exactly that value, otherwise go with Turlough Hughes' solution which is simpler. The eas...

How do I determine which row my value change significantly

Im assuming its roughly 375 and not exactly that value, otherwise go with Turlough Hughes' solution which is simpler. The eas...

6 månader ago | 0

Answered

How to plot a function with different values

You can make M a column vector, then calculate S as a matrix then if you plot it against t which is a row vector plot should tr...

How to plot a function with different values

You can make M a column vector, then calculate S as a matrix then if you plot it against t which is a row vector plot should tr...

6 månader ago | 1

| accepted

Answered

How to extract a value out of different .mat files and save them into an array

s = load('my_file_5.mat'); will return a struct, each variable in the file will be put in a field in that struct if all files ...

How to extract a value out of different .mat files and save them into an array

s = load('my_file_5.mat'); will return a struct, each variable in the file will be put in a field in that struct if all files ...

6 månader ago | 0

| accepted

Answered

Mean of the third dimension

try this: avgPerYear = nanmean(rain, [1,2]); that would generate an inconvenient 3rd dimention vector so you can reshape it i...

Mean of the third dimension

try this: avgPerYear = nanmean(rain, [1,2]); that would generate an inconvenient 3rd dimention vector so you can reshape it i...

7 månader ago | 1

Answered

how to find out how many columns have more than 50 elements which are greater than 1?

x = rand(100) * 2; atLeast50 = sum(x > 1, 1) > 50;

how to find out how many columns have more than 50 elements which are greater than 1?

x = rand(100) * 2; atLeast50 = sum(x > 1, 1) > 50;

8 månader ago | 0

Answered

Array indices must be positive integers or logical values.

in Matlab, matrix indices start from one, not zero like other programming languages, but your index starts from zero: colum-dtn...

Array indices must be positive integers or logical values.

in Matlab, matrix indices start from one, not zero like other programming languages, but your index starts from zero: colum-dtn...

9 månader ago | 0

Answered

Is there a faster way of splitting a cell array into numeric array while preserving NaN?

try this endsWithSemicolon = cellfun(@(s) endsWith(s, ';'), data); x = cellfun(@(s) textscan(s, '%f', 'Delimiter', ';', 'Empty...

Is there a faster way of splitting a cell array into numeric array while preserving NaN?

try this endsWithSemicolon = cellfun(@(s) endsWith(s, ';'), data); x = cellfun(@(s) textscan(s, '%f', 'Delimiter', ';', 'Empty...

9 månader ago | 2

| accepted

Answered

A question on regexprep

A is not a match for your regexp, match = regexp(s,'\<(\w)(\w*)(\w)\>', 'match') match = 1×5 cell array {'John'...

A question on regexprep

A is not a match for your regexp, match = regexp(s,'\<(\w)(\w*)(\w)\>', 'match') match = 1×5 cell array {'John'...

10 månader ago | 0

| accepted

Answered

What exactly is a StartPoint for a Curve Fitting Tool, its significance and how it works?

curve fitting works by trying to find the parameters of your model, lets say you are trying to fit a gaussian to a single peak c...

What exactly is a StartPoint for a Curve Fitting Tool, its significance and how it works?

curve fitting works by trying to find the parameters of your model, lets say you are trying to fit a gaussian to a single peak c...

10 månader ago | 1

| accepted

Answered

how do I allow user to choose a folder to run the rest of the functions?

<https://www.mathworks.com/help/matlab/ref/uigetdir.html uigetdir>

how do I allow user to choose a folder to run the rest of the functions?

<https://www.mathworks.com/help/matlab/ref/uigetdir.html uigetdir>

10 månader ago | 0

Answered

Create array of “deep” struct (scalar) fields

As always, you can use a small utility function to drill down the object hierarchy It's probably not the most elegant solution ...

Create array of “deep” struct (scalar) fields

As always, you can use a small utility function to drill down the object hierarchy It's probably not the most elegant solution ...

10 månader ago | 1