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Plot starts at 1

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Benedikt Schumacher
Benedikt Schumacher il 19 Set 2022
Hello everyone,
I have a plot what starts at one instead of zero.
Can someone tell me were my fail is?
B=app.BEditField.Value;
C=app.CEditField.Value;
D=app.DEditField.Value;
E=app.EEditField.Value;
x = linspace(0,pi,100);
y=D*sin(C*atan(B*x-E*(B*x-atan(B*x))));
plot(app.UIAxes,y);
app.UIAxes.YLim = [-0.2 (D+0.2)];
app.UIAxes.XLim = [-10 100];

Risposte (1)

Stephane Dauvillier
Stephane Dauvillier il 19 Set 2022
Hi you should use x and y in the plot command:
plot(app.UIAxes,x,y)
  4 Commenti
Steven Lord
Steven Lord il 19 Set 2022
That is correct. For an explanation, from the Description section on the plot documentation page:
"plot(Y) plots Y against an implicit set of x-coordinates.
  • If Y is a vector, the x-coordinates range from 1 to length(Y).
  • If Y is a matrix, the plot contains one line for each column in Y. The x-coordinates range from 1 to the number of rows in Y."
In this case, app.UIAxes is not X data (which would cause MATLAB to use the plot(x, y) syntax.) It is recognized as an axes so the first syntax in Additional Options is used, then the remaining input is interpreted as Y data using the syntax above.
Stephane Dauvillier
Stephane Dauvillier il 20 Set 2022
your plot with x is the right one.The limits of the axes are not what you want but the data are well drawed.
ANd you can use the function below to set the limit of axes
xlim(app.UIAxes,[-10,100])
ylim(app.UIAxes,[-0.2,0.2+D])

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