warnerchang

Last seen: environ 2 mois il y a | Actif depuis 2021

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Make a Plot with Functions
Make a plot and test

4 mois il y a

A résolu

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. ...

4 mois il y a

A résolu

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 ...

4 mois il y a

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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 ...

4 mois il y a

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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. ...

4 mois il y a

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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 ...

4 mois il y a

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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...

4 mois il y a

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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...

4 mois il y a

A résolu

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...

4 mois il y a

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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...

4 mois il y a

A résolu

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...

4 mois il y a

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...

8 mois il y a | 1 réponse | 0

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Question

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？

9 mois il y a | 1 réponse | 0

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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...

10 mois il y a | 1 réponse | 0

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réponse

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...

10 mois il y a | 1 réponse | 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 ...

10 mois il y a | 2 réponses | 0

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Question

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

10 mois il y a | 2 réponses | 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...

10 mois il y a | 1 réponse | 0

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réponse

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?

10 mois il y a | 1 réponse | 0

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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 ...

10 mois il y a | 1 réponse | 0

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réponse

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)=[];

11 mois il y a | 1 réponse | 2

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