# Pouyan Msgn

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Question

Using curvefit for conditional functions

I have some data and I want to fit it with a function. Here is my attepmt clear all clc X1=[-23.24 -16.79 -14.4 -10.39 -7.494...

2 years ago | 1 answer | 0

### 1

answerQuestion

How to plot a function graphically

I have an equation : that I'd like to plot it. I have a graphical solution: I will reproduce the plot where = 1/2pi (The ...

3 years ago | 1 answer | 0

### 1

answerQuestion

How to plot the Free particle wave function

Hello! I have the function: And a plot from my book is : As you see in the picture, as a function of x/a is ploted. ...

3 years ago | 1 answer | 0

### 1

answerQuestion

To define the frequency range when we use FFT

In my code, I've solved a differential equation numerically, now the goal is to use FFT and plot it in order to find the phase f...

3 years ago | 1 answer | 0

### 1

answerQuestion

Having all the codes in a single file

I saw an example of boundary value problems in the book Numerical Analysis by Sauer. We have the non-linear equation: Th...

3 years ago | 0 answers | 0

### 0

answersQuestion

How to perform mathematical conditions

I have to reproduce this plot: The function is : As you see in the plot, on the Y-axis we have this condition : [0,-pi...

3 years ago | 1 answer | 0

### 1

answerQuestion

Same Y-axis but two X-axis

Hi ! I wish to have this code with two X-axis... clc clear all x=-4:0.1:4; y=sin(2*x); plot(x,y) grid on figure x2...

4 years ago | 1 answer | 0

### 1

answerQuestion

How to save some values from one vector to another

I have 2 files and I saved them in one vector: clc clear all D1=importdata('M1.txt'); t1=D1(:,1); A1=D1(:,2); D=importdata...

4 years ago | 1 answer | 0

### 1

answerQuestion

To integrate histogram bins

Hi ! I have 2 files where I have first to create histogram and then find the integrated value of some bins! clc clear all D1...

4 years ago | 1 answer | 0

### 1

answerQuestion

How to export a txt file

I have a txt file here but there is a problem in the X-axis and I have to reduce it by the value 1.4 I did it in Matlab but I ...

4 years ago | 0 answers | 0

### 0

answersQuestion

Deconvolution of Guassian curve

I have a curve here which I have to deconvolve it into many other curves with different peaks. The resault is this in another pr...

4 years ago | 1 answer | 2

### 1

answerQuestion

Is the Trapz feature always accurate?

I'm analyzing some spectrum ... In another program FitXPS I enter some data and want to integrate the intensity (which is in Y-a...

4 years ago | 1 answer | 0

### 1

answerQuestion

Symbolic calculation and to solve out a variable

I have the equation : I_1=2.15 ; I_2=8.625; n2=0.039; n1=0.1; L_1=16.76*10^-10 L_2=15.56*10^-10; I tried with this code ...

4 years ago | 2 answers | 0

### 2

answersQuestion

Importing txt files and using loops

I have three txt files and I want to use their nummerical data in Matlab How can I ignore and neglect non-numeric texts? I wa...

4 years ago | 3 answers | 0

### 3

answersQuestion

Normalize and integrate a curve

Hello! If I want to normalize and integrate this curve, how should I do it? clc clear all Data1=importdata('J30.txt'); ...

4 years ago | 1 answer | 0

### 1

answerQuestion

Finding eigen vectors of a matrix

Hi I will use [V,D]=eigs(C,3,'LA') to get the three first eigenvectors of matrix C: clear all clc N=5; L=1; h=L/N; C=zeros...

5 years ago | 2 answers | 0

### 2

answersQuestion

solving two symbolic equations simultaneously

Hi ! I will not use matrix to solve this problem; if we have: x + y = a x - y =b We know we can get by hand and paper: x=(...

5 years ago | 2 answers | 1

### 2

answersQuestion

Symbol calculation and numerical values

Hi! I have my code here : clc clear all syms k w m e s eqn=k==[w*sqrt(e*m/2)*sqrt(sqrt(1+(s/(w*e))^2)-1)] k=1; e=0.00...

5 years ago | 1 answer | 0

### 1

answerQuestion

Solve out a symbol

Hi I have the formula : k=w*sqrt(e*m/2)*sqrt(sqrt(1+(s/(w*e))^2)-1) And I will solve out s: clc clear all syms k w m ...

5 years ago | 1 answer | 0

### 1

answerQuestion

To plot a sketch

Hi! I have a function here : this is when 0<= x<=a when a<= x<=b I have to to sketch this.... Can I do this without gi...

5 years ago | 1 answer | 0

### 1

answerQuestion

Fron Python to Matlab

I got a code in Python that I will write it again in Matlab and get the same plot: The code is : npts = 1000 # number of poin...

5 years ago | 2 answers | 0

### 2

answersQuestion

How to plot rectangular potential in matlab

I will try to plot something like this : <</matlabcentral/answers/uploaded_files/140329/u3.jpg>> Observ that this is a re...

5 years ago | 1 answer | 0

### 1

answerQuestion

Plotting an equation with Matlab

Hi I will plot T(E) <</matlabcentral/answers/uploaded_files/139729/CodeCogsEqn.gif>> where K2 is <</matlabcentral/answ...

5 years ago | 1 answer | 0

### 1

answerQuestion

Solving equation in Matlab

Hi I obtained these results using Mathematica. If I want to get the same with Matlab, how should I do? At least I will get the...

6 years ago | 1 answer | 0

### 1

answerTo draw an intensity curve with Matlab

This how I could develop the code but I fail with one thing ! clear all clc F=@(L,T) 3.7415E-16 ./((L.^5).*(exp(0.014 ...

7 years ago | 0

To draw an intensity curve with Matlab

Thank you! I get this after your help and using max function but I don't know how should I use text function to write the valu...

7 years ago | 0

Question

To draw an intensity curve with Matlab

I have a function : <</matlabcentral/answers/uploaded_files/70096/latex1.gif>> And I want to draw the intensity curve : ...

7 years ago | 3 answers | 0