# weikang zhao

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**Content Feed**

Number generator for 0.00006 to 30 range

It looks like you don't want these random numbers to follow a uniform distribution, you want their logarithms to follow a unifor...

6 months ago | 1

Unclear array operation in matlab

Hello, this is matlab's unique indexing mechanism. For a 5*3 matrix, you can use 1-15 to index all elements. Matlab uses column...

7 months ago | 1

Efficiently find a value in a matrix

From the perspective of computational complexity, your code can no longer be optimized. You can seek help from GPU acceleration ...

2 years ago | 0

| accepted

Why is my function returning these error messages?

You may have missed all the multiplication signs, such as: t = p*((1-cosd(alpha))/3 + cosd(alpha)) + q*(((1-cosd(alpha))/3 - si...

2 years ago | 0

| accepted

Finding matching points between two 2d point sets, but different sizes

I provide a feasible solution. Assuming that the length of xy1&`xy2` are m and n, first generate a set of size m*n, including t...

2 years ago | 0

Finding matching points between two 2d point sets, but different sizes

if you dont need a very precise result, clear load('xy1.mat'); load('xy2.mat'); fixdistance=[-0.27,2.3]; newxy1=xy1+fixdis...

2 years ago | 0

How to sort a column of data based on another?

`[B,I] = sort(___) also returns a collection of index vectors for any of the previous syntaxes. I is the same size as A and desc...

2 years ago | 0

How to write _ in a plot legend?

change the Interpreter like other answers Tex has its own escape for _ : legend('a\_b');

2 years ago | 0

loop with uniform distribution

for loop is unnecessary; Wrong way to index matrix u; t1 is unnecessary cause t1 have the same probability distributions with ...

2 years ago | 1

| accepted

How can we find the width in an image at any three positions.

If you only have one figure to process, use edge() to detect the edge of the figure, then manually find the edge and use linear ...

2 years ago | 0

create a program that estimates pi by simulation

This seems to be your homework and not a technical problem. Normally, I don’t do homework for others, but this question is simpl...

2 years ago | 0

Generate a matrix the shifts variables one column

some error: The matrix given in the picture is a (N+1)*(N+1) matrix. The (2,0) element of the matrix is not given, I assume it i...

2 years ago | 0

Split vector by value ranges?

Use anonymous functions, it allows you to implement quite complex functions in one line. MATLAB supports dot indexing into funct...

2 years ago | 1

| accepted

How can I plot a circle use given point?

If you have coordinates of three points, the radius and center of the circle can be obtained by solving a positive definite equ...

2 years ago | 0

How to change the X axis scale in a wavlet?

You can freely control the position and content of the axis display by setting 'XTick' & 'XTickLabel' of the Axes object. for e...

2 years ago | 0

Average of selected elements in Matlab

easy, use "conv" x=conv(a(:,2),[1/3,1/3,1/3]); the first element and the second element of 'x' are useless. have fun

2 years ago | 1

| accepted

how do i read multiple audio file from different files name ?

You need a loop body, the loop body continuously generates the path of the audio file. Run the following script and you will un...

2 years ago | 1

Loading binary data into custom array

The “fopen” function may be more flexible. It allows you to access the data in the binary file in any way, of course, including ...

2 years ago | 0

finite Integral in matlab

use the numerical integration function "integral" integral(@(x) sqrt(10/(3*9.81)) ./ sqrt(-2*cos(x) - sin(x) + 2*cos(pi/6)-sin(...

2 years ago | 0

how to make such type of plot in matlab? we have 4 models and each model have different depth and different velocities v1, v2.

I tried to restore part of the picture by visually inspecting the values. As a demonstration, two lines (model A & model LE) are...

2 years ago | 0

| accepted