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# Jonas Freiheit

Last seen: Today Active since 2020

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Question

Empty figure when trying to plot in a for loop
Hi all, I was wondering why I am presented with an empty figure when trying to plot in a for loop. My x and y variables seem to...

1 month ago | 1 answer | 0

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Question

Unable to solve for a variable
Hi all, I am trying to solve for a variable 'a' and saving it into an array, However, I am left with an inifinitely long runnin...

2 months ago | 2 answers | 0

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Error solving for a particular variable from two equations
Hi all, I am having trouble with solving for a particular variable 'a' from two equations, I end up with an error saying : Arr...

2 months ago | 1 answer | 0

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Question

Hi all, I am wondering if there is anyone here that is really good with PCA on Matlab and coding. having an issue with my curre...

3 months ago | 0 answers | 0

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Question

Generating a categorical array with group names
Hi, I was wondering how I can generate a 4751x1 cell { } which contains inside three different group names. So 1055 entries o...

3 months ago | 1 answer | 0

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Question

creating a 5046x1 { } cell with specific category names
Hi, I was wondering how I can generate a 5046x1 cell { } which contains inside three different group names. So 1682 entries of...

3 months ago | 1 answer | 0

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Question

Extracting specific data from multiple excel files and create a single matrix from those
Hi, I have a file on my computer with close to 1000 excel files and I don't want to manually extract the second row from every e...

3 months ago | 2 answers | 0

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Question

Blank screen when plotting a graph and how to partial differentiate?
p_RK = @(v,T) (R*T*(1/(v-b) - a/(R*T^1.5*v*(v+b)))) % The redlich kwong equation How can I partiall differentiate this function...

4 months ago | 0 answers | 0

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Question

How can I make a system identify if a solution has no solutions?
Hello, I was wondering how I can make this backsubstitution program identify whether a solution is infinite or has no solutions...

1 year ago | 1 answer | 0

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Question

Variable x must be of data type double. It is currently of type sym. Check where the variable is assigned a value.
Hello, I was wondering how I could change my variable 'x' to type double from syms. I've tried converting it to type double wit...

1 year ago | 1 answer | 0