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# Rik

Last seen: Today Active 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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ifversion
Determine if the current version satisfies a version restriction

mex - setup FORTRAN can't install for 2017b or 2021a for windows 10
MinGW is only for C an C++, not Fortran. The linked page looks like you need the Intel Parallel Studio XE. The 2017 version s...

3 days ago | 0

why the command "figure(gcf+1)" gives error?????
The gcf get the handle to the current figure. In old releases this used to be a double, but since several years ago it has been ...

3 days ago | 0

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Submitted

JSON
Matlab/Octave JSON parser

How to vectorize nested for loops
ndgrid will do the trick: rowsA=59; pix = 25.4/600; R = 2.5; ht = 1.5; A=abs(-rowsA:rowsA); % e.g. 5 4 3 2 1 0 1 2 3 4 5 size...

4 days ago | 0

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New. to Matlab, can you help me with the code?
A much better solution is to learn Matlab with a tutorial. You may consider doing the Onramp tutorial (which is provided for fre...

5 days ago | 1

Have problem in solution
It looks like you want different things to happen depending on the value of Erf: for every element smaller than 2 you want y to ...

5 days ago | 0

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How can I obtain the permutation of 3 binary variables?
The easiest way to do this is with bin2dec. You can loop from 0 to 2^n-1 to get all combinations. To convert the character array...

6 days ago | 0

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how to find the answer of:
Use the inverse of tan: atan B=atan(log10(50)/exp(0.53))

6 days ago | 0

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How to create an independent loop?
If you want something to be independent, you need to use a function: for n=1:200 my_fun(n,struct_with_your_other_variables...

6 days ago | 1

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How to unstructure the structure data?
If you use the normal dot indexing with a struct array, that will generate a comma separated list. You can put that between bra...

10 days ago | 1

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find function using wildcards
You can use the patterns introduced in R2020b: str={'/* GeoForschungsZentrum Potsdam ...

11 days ago | 1

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How can I use fprintf to print matrix by column?
fprintf tranverses the input in a column-major order. If you want to change that, you can't, so you will have to flip the array ...

11 days ago | 0

I wrote this code and it didn't work and its gave me " Unrecognized function or variable 'seq' " error , What I can do to sole this error??
Apparently your code doesn't guarantee the creation of the seq variable. Since it only occurs in block starting with Test=='T', ...

11 days ago | 0

How to check for data normality using kstest?
If you want to test if your data is from a standard normal distribution you should not change it before calling kstest. If yo...

12 days ago | 0

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How can I mouse pick up and move
You can do this with the WindowButtonDownFcn (or the equivalent for uifigures: ButtonDownFcn). Inside that callback you can ret...

14 days ago | 0

How can i read in a .txt file without the first column gets saved?
I prefer not to mix tasks. I first read my file, then I do the processing. It is generally a lot easier to remove parts of char ...

14 days ago | 0

Mathmatica saving Matlab files as Wolfram Mathmatica Package files
Your files have not changed, only the description your OS displays. You should look up a guide for your specific OS. On windo...

14 days ago | 0

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graph with two formulas
You probably want the errorbar function: x = 1:10:100; y = [20 30 45 40 60 65 80 75 95 90]; err = 8*ones(size(y)); errorbar(...

14 days ago | 0

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Solved

The Piggy Bank Problem
Given a cylindrical piggy bank with radius g and height y, return the bank's volume. [ g is first input argument.] Bonus though...

14 days ago

Pressure drop script is not running
If you have problems with a function, you should really check the documentation. The input function does not work like you expe...

15 days ago | 0

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How to extract common points from a csv file with same Id?
The easiest way is probably with histcounts (or histc on old releases).

18 days ago | 0

Is the Raspberry pi MATLAB and SIMULINK support package compatible with the raspberry pi 400?
The Pi 400 is identical to the Pi 4 in most relevant aspects, so I think you can expect it to work.

18 days ago | 0

How to add 3th moving ball
If you replace numbered variables with arrays you can use simple loops with indexing. With your current setup you will have to c...

18 days ago | 0

Replacing for loop in the function
What you want is not possible. Depending on what f is there might be ways to avoid the loop and use vector-operations instead, b...

20 days ago | 1

Why do I get the error '??? Output argument ‹variable› (and maybe others) not assigned during call to ‹function›.' ?
The error is in getgamspath. Consider this function: function [output1,output2]=IncorrectFunction output2=1; end Running it ...

20 days ago | 0

how to define and write the first line of a function while one of the inputs are a matrix with strings as entries (strings are defined in the body of function)
You can only have variable names in your function signature, not any indexing. function PS=level2(NOH,NOC,tetta,A)

23 days ago | 0

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How to load multiple .mat files containing timetables into the workspace and concatenate them vertically
If you use struct2cell (either inside your loop or in a cellfun) you can extract the data itself. Then you should be able to use...

24 days ago | 0

what is the alternative of cd in .executable app ?
You can use && to execute another command if the first one completes successfully: doscmd = [... 'cd /d "' pathTargetFiles...

24 days ago | 0

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Getting wrong results while calling a function.
Some numbers cannot be represented exactly in binary. You will either need to round both numbers to make sure they have the exac...

25 days ago | 1