Rik

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2 109 total contributions since 2017

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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Answered
Redistribution of histogram type data in specified bins
You should be really careful with this resampling, especially for so few samples. Since you're assuming a flat distribution in ...

environ 16 heures ago | 0

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Solved it, thanks anyway
Step by step. Split up your problems in manageable parts. If you have the coordinates of all corners of your polygon, you can u...

environ 16 heures ago | 0

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matlab area calculation under fitted curve
You can use trapz for a numerical approximation of an integration. By selecting your bounds you can use this to calculate the ar...

environ 16 heures ago | 0

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Code is not working, can someone help me?
This should fix it: function s = Sum1(x,y,z) s = 0; for i=0:min(x,y) for k=0:x-i s = s + (-1)^k * QuantumDi...

1 jour ago | 1

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extract structure array value
You can hide the loop with arrayfun, but be aware that a good loop is always better than cellfun or arrayfun. You should ask you...

1 jour ago | 0

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Error at 13.2
You edited the code of the Further Practice section, instead of the Task 1 & 2 section.

1 jour ago | 0

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calling class into another class
Here is an example from the documentation: classdef PositiveDouble < double methods function obj = PositiveDouble(da...

2 jours ago | 0

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How do I add a black border around an image?
You can pad an array with zeros. IM=uint8(255*rand(100,100)); IM2=zeros(120,120,'like',IM); IM2(11:110,11:110)=IM; imshow(IM...

3 jours ago | 0

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How to export the data corresponding to the new pixel size?
doc imresize

3 jours ago | 0

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Sub-matrix Access in a Square Pattern
It looks like either blockproc or mat2cell is what you're looking for.

3 jours ago | 2

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Write a function called valid_date that takes three positive integer scalar inputs year, month, day. If these three represent a valid date, return a logical true, otherwise false. The name of the output argument is valid.
You test everything at once. You can do that, but you need to pay attention to what is evaluated first: %steps in evaluation: ...

3 jours ago | 0

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Merging Smaller Cells into a Bigger one
The source of your problem is that you are using the same indices for your big array as for your smaller array. The solution to...

5 jours ago | 0

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Split Climate Data for month and yers
d=19300101; s=sprintf('%08d',d); y=str2double(s(1:4)); m=str2double(s(5:6)); d=str2double(s(7:8)); Or even simpler: d=1930...

5 jours ago | 0

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While Loop regarding user input type stuck on infinite else loop
The data type of R is not changing, so if you create it as a char, it will never be numeric. If you want to use this setup, you ...

5 jours ago | 0

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Answered
adding functions to path
Start with the documentation. It is one of the major advantages of Matlab over competing platforms. Do you understand what these...

5 jours ago | 0

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How to use 2 matrixes as the xlabel to a plot?
doc datetime

5 jours ago | 0

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How to plot a line graph (x,y) with a color bar representing z-axis...
You can use plot, colorbar, colormap, and caxis. You can adjust the line color by setting the Color property of the line object ...

8 jours ago | 1

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Load sequential numbered files in MatLab on the same script in different subfolders
Use mydata_folder{1} instead of mydata_folder1. That way you can use a simple loop instead of having to generate the variable na...

8 jours ago | 0

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Making An Output Display Twice What the Input Was
You need to make sure you receive the input as a numeric data type, or you need to convert the string input to a double (that is...

9 jours ago | 0

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X Bar doesn't show all labels
I don't really see why, but if you check get(gca,'XTick') you will notice that only the 1 and 2 have ticks in the first place. ...

10 jours ago | 0

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How to selectively save the names and values of some workspace variables to a CSV file?
This should do the trick. If the variables aren't scalars the results might not be what you want. a = 3; b=7; c=5; d=9; sav...

11 jours ago | 1

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Answered
R2018b (MATLAB 9.5)
With external link, do you mean a pirated link? Because I don't think anyone will help you here. Do you have valid license? If ...

11 jours ago | 1

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Count characters per row
Trivial if you read your file to a cell array (e.g. with readfile, which you can get from the FEX or through the AddOn-manager (...

12 jours ago | 0

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Remove line from text file if in the first column there is a certain character
Split the lines to cells and use a loop (or cellfun) to remove all elements where strcmp(contents(1),'$') is true. Then you can ...

12 jours ago | 0

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Answered
simulate 500 different samplings with each sample containing 9 people from an array
doc randperm

13 jours ago | 0

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Why is latlon2local giving a error saying that it is undefined?
The latlon2local function was only introduced in R2020a, as the documentation clearly states. You will have to implement it your...

15 jours ago | 0

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Suggestions for Input type from user
Your first problem can be avoided by using digit{1}(i) instead, since the numbers 1-9 don't change between values. Then you wil...

16 jours ago | 0

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Problem with the code
You should check the rest of the file, because this is not the part of your code that will trigger that issue. There are some th...

17 jours ago | 1

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Unable to perform assignment because the size of the left side is 1-by-1 and the size of the right side is 1-by-0.
This should do the trick: %your inital code: d = 1:10; dref = [3 5 7]; A = repmat(d, length(d),1); B = zeros(length(d),leng...

17 jours ago | 0

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Answered
Sending ascii characters through system or dos command
If you don't find a real solution: you can write the command to a bat file and run that instead. You can use the > symbol to red...

17 jours ago | 0