Questions tagged [MATLAB] (105)

I have a program that builds a three-dimensional graph. And I need two-dimensional for a fixed t. spoiler</function diffuzia x0=0; xt=10000; t0=0; tt=120000; m=300; n=10000; dt=(tt-t0)/n; h=(xt-x0)/m; u(1:m/2,1)=0.3; u((m/2+1):m+1,1)=0; for j=1:n for i=2:m if i==2 u(i-1,j)=u(i,j); end if i==m u(i+1,j)=u(i,j); en...

The expression complicated. Is a method of staging or using plot to plot and detail, Maple does not consider normal, and not familiar with MAtlab.

Make a program in scilab, but there is such a tag seems not. The problem lies in the part of the code where I'm trying out matrix constraints Aeq and right sides of the inequalities beq to make foaly tipo y = 2x + 1 for the function plot. What error was there that I learned because first disp in the loop displays the valu...

The task: run a spectral analysis and synthesis of functions using the fast Fourier transform (FFT). With the spectrum analyzer still clear, but with a spectral synthesis of function - no. Tell me, what is this synthesis, and what is its result? As the clause specified that if you do a reverse FFT, you need to consider 1, 2...

it would look like is a formula in Matlab? you need to write but have no idea how to write ]2.3 it seems H1 = [(x(1+x*2)+(1+2x)*2]2.3 but it is wrong ideas?

Are there any ready Matlab methods for inverse regression? There are methods stepwise, stepwisefit, stepwiseelm, but they as I understood first perform a forward regression, and then backward. Is it possible somehow to have only backward selection? And if so, how? Please give examples of such methods

How do I make it so that when I enter values in "txt" and "txt2", they are saved in variables, so I was able to use them in "def next():" [in my example is to put the end code "plt.plot(x,y, '--bo')"]import matplotlib.pyplot as plt from tkinter import* import tkinter def start(): window = Tk() window.title("Entry point...

Installed, no icon((( that in the folder - it is not clear what to start.

Do I need a key? I at least have a trial version to put.

In Matlab do not look painted as simply as possible, I need more to understand the algorithm. The brief description to find the most similar array in another array. The problem is, 2 images, 1 of them is a piece of the second (may not be), it is necessary to find coordinates of where the smaller image it looks like more tha...