# Jonas Freiheit

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Question

Trajectorys of 4 objects on 3D plane not symmetrical

Hi all, Sorry i'm a beginner at Matlab and am having issues with getting 4 spots on a 3D plane with the intitial conditions (0,...

11 månader ago | 1 answer | 0

### 1

answerQuestion

Matlab plot3 not giving a 3D plot

Hi all, Sorry I'm a beginner with Matlab and don't understand why my plot3 with 3 inputs is not giving me a 3D representation of...

11 månader ago | 1 answer | 0

### 1

answerQuestion

Error using plot3 not enough input arguments

Hi all, When I am trying to plot my dots on a 3D plane I get an error with plot3 telling me there are not enough input argument...

11 månader ago | 1 answer | 0

### 1

answerQuestion

Out of memory error message when attempting to plot in 3D

Hi all, From my following code as I'm trying to plot the trajectory of 3 bugs in three dimensions I am presented with the folll...

11 månader ago | 1 answer | 0

### 1

answerQuestion

Translating matlab to python

Hi All, I would like to translate the following program which combines the second row all column data from excel files in a fol...

mer än ett år ago | 0 answers | 0

### 0

answersQuestion

Invalid data type. First argument must be numeric or logical error when using simplisma

Hi all, I am getting an error when using the function simplisma(datar,varlisst,1,2). Where datar is a 2x261 table when an FTIR ...

mer än ett år ago | 1 answer | 0

### 1

answerQuestion

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...

mer än ett år ago | 1 answer | 0

### 1

answerQuestion

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...

mer än ett år ago | 2 answers | 0

### 2

answersQuestion

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...

mer än ett år ago | 1 answer | 0

### 1

answerQuestion

principal component analysis loading plots *Advanced*

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...

mer än ett år ago | 0 answers | 0

### 0

answersQuestion

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...

mer än ett år ago | 1 answer | 0

### 1

answerQuestion

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...

mer än ett år ago | 1 answer | 0

### 1

answerQuestion

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...

mer än ett år ago | 2 answers | 0

### 2

answersQuestion

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...

mer än ett år ago | 0 answers | 0

### 0

answersQuestion

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...

mer än 2 år ago | 1 answer | 0

### 1

answerQuestion

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...

mer än 2 år ago | 1 answer | 0

### 1

answerQuestion

Index exceeds the number of array elements (1)

%When I try to perform a row interchange for 'b' vector It tells me it exceeds the no of array elements. This is an attempt to p...

mer än 2 år ago | 1 answer | 0