Graph plot always appears as a straight line
显示 更早的评论
Hi, I don't know how to fix this. y graph looks like a straight line instead of an exponential curve. Please help me.. thanks a lot in advance !
l=0.5;
i=22/7;
v=0.8;
p=0.1;
x=[0:0.2:1.0];
y=(p*r^4*x)/(8*v*l);
plot(x,y)
5 个评论
Abhinandana R
2019-1-23
sir actually I need a graph that looks like a curve for the following equation
I'm new to this software sir. I tried the above coding as per my knowledge. This equation is a function of r sir(y varies according to r). so now ,can we draw a graph that looks like a curve? if yes, kindly suggest me the coding sir. it will be helpful for my project work sir and we can give any values to the variables r, x, u and l.
Stephen23
2019-1-23
"y varies according to r"
But what you calculated is y varing with x.
Abhinandana R
2019-1-23
madhan ravi
2019-1-23
see Rik Wisselink’s answer below
采纳的回答
Rik
2019-1-23
You are varying x, instead of r. The code below shows how you could edit your code to plot y as a function of r.
l=0.5;
i=22/7;
v=0.8;
p=0.1;
x=0.1;
n_r_steps=100;
r=linspace(0,1,n_r_steps);
y=(p*r.^4*x)/(8*v*l);
plot(r,y)
3 个评论
Abhinandana R
2019-1-23
thanks a lot sir. but it gives the value in the command window instead of graph.
I need a graph for the below equation sir. can you suggest a coding for this??
Rik
2019-1-23
If you run this code, it will plot the graph in the current axis. If it does not exist, it will create one.
I don't know how you would manage to have this make any output in the command window, unless you have a variable with the name plot.
Abhinandana R
2019-1-23
更多回答（1 个）
Kevin Phung
2019-1-23
编辑：Kevin Phung
2019-1-23
0 个投票
if r is a constant, you will get a straight line. if r varies, then you will get a curve.
also, you may want to add a period before your raising to a power and multiplcation for non-scalars.
so .^ and .*
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