# Matlab does not plot data which are mirrored data

2 views (last 30 days)
I G on 27 Feb 2021
Edited: Cris LaPierre on 27 Feb 2021
I have variable r with dimension [1x2002] and values
r = [1 0.9 0.8 0.7 . . . 0.7 0.8 0.9 1]
and variable u0 with dimension [1x2002] and values
u0 = [0 0.0001 0.0002 . . . 0.0002 0.0001 0]
When I plot these data as plot(r, u0) I got only half of these values, but I need all values from my variables (whole velocity profile u0, not just half velocity profile as I got), how I can do that?

Cris LaPierre on 27 Feb 2021
Edited: Cris LaPierre on 27 Feb 2021
It's plotting it all. It just appears that your data overlaps itself.
Compare these examples
r=abs(-1:0.1:1);
u0=-abs(-1:0.1:1) + 1;
plot(r,u0) % to this
r=-1:0.1:1;
u0=-abs(-1:0.1:1) + 1;
plot(r,u0) You can check this by plotting without specifying x values. This will plot the y values using their index number as for x. This will allow you to see the values of every u0 value.
plot(u0) ##### 2 CommentsShow 1 older commentHide 1 older comment
Cris LaPierre on 27 Feb 2021
Edited: Cris LaPierre on 27 Feb 2021
That would confuse me, but your xticklabels do not have to be the same as your xtick locations. I might do something like this to put it on the same plot.
r=-1:0.1:1;
u0=-abs(-1:0.1:1) + 1;
plot(r,u0)
xticklabels(abs(str2double(xticklabels))) To use the approach that uses the index number for x, you could do something like this.
plot(u0)
xlim([1,length(u0)])
xticks(linspace(1,length(u0),5))
xticklabels(abs(linspace(-1,1,5))) Jan on 27 Feb 2021
If the 2nd half of the data equals the 1st half in different order, you do plot all data, but the line overlap. See:
r = [1 0.9 0.8 0.7 0.7 0.8 0.9 1]
u0 = [0 0.0001 0.0002 0.003 0.003 0.0002 0.0001 0]
figure
plot(r, u0)
figure
plot(r(1:4), u0(1:4), 'r+')
hold on
plot(r(5:8), u0(5:8), 'bo')
I G on 27 Feb 2021
How can I plot it as in mirror, so that they not overlap each other?

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