# Rik

E-mails with feedback/questions about FEX submissions are welcomed. In general I will post e-mails about Answers on the related page, unless there is good cause not to do so.

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xlswrite different columns into excel each run

If you switch to writematrix, you can set 'WriteMode' to 'append'. If you want to stick with xlswrite, you will have to read th...

15 hours 前 | 0

Do I need to buy other toolboxes to use Financial Toolbox

This indicates that the Financial Toolbox will not work properly (or possibly not at all) without the other toolboxes. This mean...

17 hours 前 | 2

Highest-quality printed graphics with exportgraphics

For vector images only the contents of your figure matter: do you have raster images (e.g. with imshow or image)? If so, saving ...

17 hours 前 | 0

repeated condition in a for loop

Conditions like 0<t<a*b should be split in Matlab to |0<t && t<a*b|. Note that your code will be overwriting the result and t...

1 day 前 | 1

I don't understand why the last line is wrong

Your syntax is confusing. I don't think this code does what you think it does. The a and B variables are overwritten every itera...

4 days 前 | 0

how to plot a summation function in matlab using a for loop

It's a good start. You should only put the summation part in the loop, and you should store the results in a vector. (remembe...

6 days 前 | 1

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Pre-allocating cell array of anonymous functions

You can pre-allocate the cell array itself, but the contents will have to be set in the loop itself: my_fun_array = cell(1,q_to...

9 days 前 | 1

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express ODE without set a m file function

If you want to replicate the results, you need to replicate the function exactly: func=@(t,y,cd,m) [y(2);9.81-cd/m*y(2)*abs...

9 days 前 | 0

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Unable to find function @(fd)(1/(1+A(fd/fdmax2)^2)) within E:\matlab\bin\hw3.m.

As you can see, the error here is different than what you report. Did you consider changing your function to have an output arg...

10 days 前 | 0

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Date and time range picker from user

You might be interested in this example. You can easilly create an 'ok' button that will retrieve the set dates and times and cl...

11 days 前 | 0

urlread for links in html database

You can use sprintf to form the URLs. n=21001; url=sprintf('%s%d.dat','https://gml.noaa.gov/aftp/data/radiation/solrad/abq/20...

11 days 前 | 0

Renewal fee for matlab student version

There is no such thing as a renewal fee. You can keep using the student version of the release you purchased as long as you a...

11 days 前 | 1

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Help to verify obtained plots from .txt file data.

You can find an explanation for the layout tools here. It is the toolbar you see when you edit your question. How did you try t...

14 days 前 | 0

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ERROR: Array indices must be positive integers or logical values.

Actually, the result of your code is a missing variable. Once you fix that, you will have to edit your code to avoid X(0).

15 days 前 | 0

Textscan function ignores final delimiter when token is empty

From what I can tell, this is intended functionality. It is unable to match the format specification to an empty array, so it is...

18 days 前 | 0

How can I use codes downloaded in MATLAB file exchange?

With a sufficiently new release you can use the AddOn Manager to add submissions automatically. That should even take care of up...

19 days 前 | 0

How to define row and column of element in grid layout while initializing

The point you're missing is that the Layout argument is expected to be a struct. Since Layout.Row is not a valid Matlab field na...

21 days 前 | 0

how do i change the dicom file's brightness and contrast with slider bar in app designer

You should use caxis instead. That way you can adjust brightness and contrast directly without having to redraw the image every ...

25 days 前 | 0

How to make normal distribution curve from the bar chart?

Your data resolution is too low now that you have this bar chart. Unless you have the actual underlying data it is not possible ...

25 days 前 | 0

From a structure with "n" fields which each are a vector, I want to make a vector of length "n" made of the 3rd value of each vector of my structure.

The last solution you mention would be my suggestion, except you don't need the (:). file = struct('dist',{[1 2 3];[4 5 6]}); ...

1 month 前 | 0

How can I write duplicate files that are equal to or greater than 1GB to a excel file in Matlab?

You can use the unique function instead of your double loop (which could be improved by starting the second at (i+1) instead of ...

1 month 前 | 0

How can I use a for loop to interpolate to a certain number of points, and remove NaNs?

For the second part it is easy enough with a few cell vectors as an intermediate step (if you want to store the separate element...

1 month 前 | 0

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Creating an inputted number of randomised arrays

Depending on what you want to do next, you can either create a cell vector in a loop, where each element is a matrix, or you can...

1 month 前 | 1

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histcounts do not provide a reasonable output

With Matlab you generally don't have to be confused about functions. The documentation is one of the major advantages of Matlab ...

1 month 前 | 0

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Changing line colors in nested for loop not working

Why are you using eval? There is no real reason you should need it. Same goes for length: what you actually mean is numel (or pe...

1 month 前 | 0

Portable version of Matlab

Besides some trickery with a networked license, it is very likely against the license agreement to have a portable Matlab instal...

1 month 前 | 0

How to access data of regexp output (without temporary variable)?

If you insist on a single line, you can even use subsref to index the result of regexp. That will make your code hard to read an...

1 month 前 | 1

How to create a column vector corresponding to number of rows of matrices using for loop?

You should always load to a variable. Then it is a lot easier to see where your variables come from. For this case I expect you ...

1 month 前 | 0

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How to generate randomly placed circles and assign them a function-defined value

Just a clarification: M is not a function here, but a variable. Otherwise your code as posted would not work. Putting this in a...

1 month 前 | 0

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