warnerchang

Last seen: 7 dagen ago | Active since 2021

Never be afraid to try something new

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Make a Plot with Functions
Make a plot and test

5 maanden ago

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Plotting Practice
Plot cos(x) vs x as shown in the figure below. Include the appropriate title, x-label, and y-label. Note, it is case sensitive. ...

5 maanden ago

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Dog Statistics
The vectors ht and wt contains the heights and weights of 20 golden retrievers. In some cases, it was not possible to make both ...

5 maanden ago

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Determine if x is a combination of m and n
Given positive integers x, m, and n, determine if x can be written as x = am + bn for any (non-negative) integers a and b. Your ...

5 maanden ago

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Create an arrow matrix
An arrow matrix is a square matrix that contains ones on the diagonal, the last column, and last row. ...

6 maanden ago

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Calculating Student Grades
The matrix grades contains raw grades for 7 students who took your course. Each row represents a different student. The first 7 ...

6 maanden ago

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Simpson's Paradox - Calculate correlation coefficients for groups of data
Simpson's Paradox is a statistical phenomenon where groups of data can have a characteristic while the whole data set together h...

6 maanden ago

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Find the minimum of the column-maximums of a matrix
Given a matrix A, find the maximum value of each column, then return the smallest of those maximum values (ie return the minimum...

6 maanden ago

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Calculate the mean of each half of a matrix
Given a matrix with an even number of columns, n, return a 1-by-2 row vector where the first element is the mean of all the elem...

6 maanden ago

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Find Closest Constant
Given a number x, return the value that is closest to x from this list of constants: 0, 1, , e, , (also known as ). For exampl...

6 maanden ago

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Matrix Quadrants
Write a function that takes N as the input, and outputs a matrix whose upper-left (NxN) quadrant contains all ones, the lower-ri...

6 maanden ago

Question

How to plot a 3D disk with several holes quickly?
I used "patch" to plot a 3D disk with single central hole successfully, however, I do not know how to plot a 3D disk with severa...

9 maanden ago | 0 answers | 0

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Ｌｉｍｉｔ　ａｎｇｌｅ　ｉｎ　［－９０，９０］　ｄｅｇｒｅｅ
Aｓ　Ｉ　ｗａｓ　ｕｓｉｎｇ　ｏｄｅ４５　ｔｏ　ｓｏｌｖｅ　ＯＤＥｓ，　Ｉ　ｄｏ　ｎｏｔ　ｋｎｏｗ　ｔｏ　ｌｉｍｉｔ　ｔｈｅ　ｒｅｓｕｌｔ　ｉｎ　［－９０，９０］　ｄｅｇｒｅｅ．　Ａｎｙｏｎｅ　ｍａｙ　ｐｒｏｖｉｄｅ　ｓｏｍｅ　ｈｅｌｐ？

11 maanden ago | 1 answer | 0

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answer

Question

label is not at the center of axes
when I was plotting a 3D line, I tried to use xlabel/ylabel to make a axis label. However, I found these labels are not at the c...

12 maanden ago | 1 answer | 0

1

answer

Question

how can I change lighting using codes?
Now, I plot a figure, however, it is dark. And I use the button to change the lighting, I am wondering whether there exists a me...

12 maanden ago | 1 answer | 0

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Question

How to define a colormap easily
I tried to define a colormap, however it is rather difficult, because I have to choose a value and then I see what the color it ...

12 maanden ago | 2 answers | 0

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Question

what is the time complexity of function 'reshape'
anyone knows what is the time complexity of function 'reshape'?

12 maanden ago | 2 answers | 0

2

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Question

why use limit function goes wrong
syms x f=(2/pi*atan(x))^x; limit(f,x,inf,'right') Prompt：Inconsistent limit direction. however，I tried to transform the f...

12 maanden ago | 1 answer | 0

1

answer

Question

How to adjust the brightness of an image in YCbCr color space
anyone know how to adjust the brightness of an image in YCbCr color space?

12 maanden ago | 1 answer | 0

1

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Question

Why two methods give different results, and which is correct?
I use ode15i and ode45 to solve an implicit function, however two methods give different results, which is correct? clear clc ...

12 maanden ago | 1 answer | 0

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Question

why it will go wrong using 'cell'?
Recently, I ran two codes as follow: a={[],[]};a{1}(a{1}==3)=[]; % it will go wrong b=cell(1,2);b{1}(b{1}==3)=[];

12 maanden ago | 1 answer | 2

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