Plotting graphs for scaling analysis
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Hello community
I am trying to plot the following functions on one graph (as an example):-
y1=-[(x+0.25)^0.5]/x
y2=0
y3=[(x-0.25)^0.5]/x
I expect to get a continuous graph. The values of x vary from -0.5 to 0.5. I am new to MATLAB so I would appreciate it if some explanation is provided.
clear all,
clc,
dell=0.5;
n=0.5;
x1= linspace(-0.5,0,100);
y1=-((x1+(dell/2)).^(1/n))/x1;
plot(x1,y1,'-o');
hold on;
x2=0;
y2=0;
plot(x2,y2,'-o');
x3= linspace(0.5,0,100);
y3=((x3-(dell/2)).^(1/n))/x3;
plot(x3,y3,'-o');
hold off;
Currently the graph comes out like this
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/595950/image.jpeg)
I think the graph should be more like this
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/595955/image.jpeg)
Many thanks and regards
Sushant
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Réponses (1)
Star Strider
le 25 Avr 2021
The most common problem I see here on Answers is forgetting to use element-wise division, so (./) instead of (/).
Making those two corrections in ‘y1’ and ‘y3’ —
dell=0.5;
n=0.5;
x1= linspace(-0.5,0,100);
y1=-((x1+(dell/2)).^(1/n))./x1;
plot(x1,y1,'-o');
hold on;
x2=0;
y2=0;
plot(x2,y2,'-o');
x3= linspace(0.5,0,100);
y3=((x3-(dell/2)).^(1/n))./x3;
plot(x3,y3,'-o');
hold off;
It may not be the plot you want (I’m not certain what is going on with that), however it’s likely closer.
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