Trying to produce a plot of X vs P, using a for loop

Question

Collin McKenzie 2022-2-20

0
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https://ww2.mathworks.cn/matlabcentral/answers/1654410-trying-to-produce-a-plot-of-x-vs-p-using-a-for-loop

回答： Anshika Chourasia 2022-2-24

I'm fairly new to this, and I am trying to find forces at a variety of different points from 0 to 750. I have a for loop set up to do this, but the code only produces one value for x, and a blank plot. Looking for any help to point me in the right direction, or let me know what I could be doing wrong. Thanks.

clear;

clc;

P=zeros(1,750);

theta=zeros(1,750);

L=zeros(1,750);

F=zeros(1,750);

W=10;

for x = 1:750

theta(x)=atand(0.4/x);

L(x)=0.4/(sind(theta(x)));

F(x)=(W*0.5*9.8*cosd(theta(x))/L(x));

P(x)=F(x)*sind(theta(x));

end

plot(x,P(x));

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Torsten 2022-2-20

plot(1:750,P)

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Answer 1

Anshika Chourasia 2022-2-24

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Hi Collin,

According to my understanding, in your code snippet x contains a singular value and you’re trying to plot a single point.

To plot a set of coordinates connected by line segments specify X and Y as vectors of the same length in the "plot(X, Y)" function. Please refer this link for more information related to 2-D line plot.