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# weikang zhao

Last seen: 3ヶ月 前 2020 以来アクティブ

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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 ...

9ヶ月 前 | 0

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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...

9ヶ月 前 | 0

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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...

9ヶ月 前 | 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...

10ヶ月 前 | 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...

10ヶ月 前 | 0

How to write _ in a plot legend?
change the Interpreter like other answers Tex has its own escape for _ : legend('a\_b');

10ヶ月 前 | 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 ...

10ヶ月 前 | 1

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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 ...

10ヶ月 前 | 0

N*N matrix plot
use image() function

10ヶ月 前 | 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...

10ヶ月 前 | 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...

10ヶ月 前 | 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...

11ヶ月 前 | 1

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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...

11ヶ月 前 | 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...

11ヶ月 前 | 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

12ヶ月 前 | 1

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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...

12ヶ月 前 | 1

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

12ヶ月 前 | 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(...

12ヶ月 前 | 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...

12ヶ月 前 | 0

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