# Alex Perrakis

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**Content Feed**

Question

My App does not plot the data i read, why?

Hello Dear Matlab Community, i am trying to develope a GUI with the help of MATLBA app designer and i am hopelessly stuck, i do...

6 months ago | 1 answer | 0

### 1

answerQuestion

How do i read a line after a word in a csv file

Dear Matlab Community, i have the following question,i have a .csv (attached) file which contains multiple data, before every d...

6 months ago | 1 answer | 0

### 1

answerQuestion

Extract Values from String with sscanf

Hallo Guys and Gals, i have following code: clear close all addpath(genpath('../../Functions')) %Parameters for GRR apprai...

9 months ago | 0 answers | 0

### 0

answersQuestion

Read the third column of a .csv file

Hello Guys and Girls, i have following .csv file and i am trying to import only the 3rd column which is a temperature. The prob...

9 months ago | 2 answers | 0

### 2

answersQuestion

Read csv file 2 and 3rd row and store them in different matrices

Hello Guys and Girls, i have a .csv file which i attach and i want to read the first row and put it in a matrix and the second ...

9 months ago | 1 answer | 0

### 1

answerQuestion

Read csv in multiple directories in a loop

Hello People, i have written a function to read a specific type fo .csv measurement data, it's always called rawdata.csv , my pr...

10 months ago | 1 answer | 0

### 1

answerQuestion

read csv file with a lot of columns.

Hello guys, i have the uploaded .csv file and i would like to only read the numbers that start with 0. how do i that? i tried 'r...

10 months ago | 2 answers | 0

### 2

answersQuestion

Spatial Calibration of a graph, with demo

Hello, i got this graph and i would like to calibrate the pixels to mm, i also got this demo from another user of the forum, i ...

1 year ago | 1 answer | 0

### 1

answerQuestion

Remove object from plot

Hello People, i have following code pic01=imread("1.tiff"); pic1=im2gray(pic01); i=1; boundaries=[]; for i=3:25:222; pic05...

1 year ago | 1 answer | 0

### 1

answerQuestion

Find Periodicity of a plot to do Fourier Transformation

Hello Guys, i have following code, and which produces some plots, i would like to find the periodicity of the plot to do a Fouri...

1 year ago | 0 answers | 0

### 0

answersQuestion

Do not plot the shape in the middle and polar transformation

Hello Guys, i have the above seen plot and i would like not to plot the shape seen within the circle and the do a polar tranf...

1 year ago | 1 answer | 0

### 1

answerQuestion

Create different outline colors for different times

Hello, i have written following code, which creates an Image of outlines of some photos i took for my project, The question i...

1 year ago | 1 answer | 0

### 1

answerQuestion

Creat a loop for Image processing

Hello, i have the following code, is there any way to rewrite it to create a loop so that it subtracts the 1st photo from 2nd un...

1 year ago | 2 answers | 0

### 2

answersQuestion

Sort a Matrix by the first column connecting the row elements so that the elements of the second column 'follow' those of the first.

Hello Guys, i have a two column Matrix, where the first column is the diameter of some particles and the second column is Extic...

1 year ago | 1 answer | 0

### 1

answerQuestion

Sorting Elements of af 3D matrix in another Matrix with a condition

x1=0.05; x2=0.1; B=zeros(428,29,2); k=1; i=1; for j=1:29; %columns if x2>E_D(i,j,1)& E_D(i,j,1)>x1; B(i,k,:)=E_D(...

1 year ago | 1 answer | 0

### 1

answerQuestion

I would like to find elements of a matrix that fulfill a condition but after every loop the condition is changing.

Hello, i have a 428x29 matrix of particle diameters and i would like to sort these diametes in classes beginning from 0.05 to 0...

1 year ago | 1 answer | 0

### 1

answerQuestion

Isolate the outline of a shape.

Hello i have through binarizing and using bwpropfilt i have got the attached image, my question is : does anyone have an idea ho...

1 year ago | 1 answer | 0