how to plot excel data in a polar graph?
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hello everyone , I have Cartesian values in an excel table and I want to plot them in a polar graph, I have transformed them into polar values and radian. by executing the code I have only the empty graph that appears. Help me please. here is the code I use.
dataset=xlsread('tabl.xlsx','tableau','D2:E131');
x=dataset(:,1);
y=dataset(:,2);
[t,r] = cart2pol(x,y),
x1=t*deg2rad;
y1=r*deg2rad;
polarplot(x1,y1,'g','markers',20);
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Star Strider
2018-10-24
Note that deg2rad requires arguments. I am somewhat surprised not providing them did not throw an error.
- Angular coordinate, returned as an array. theta is the counterclockwise angle in the x-y plane measured in radians from the positive x-axis. (Emphasis added.)
You did not provide your ‘tabl.xlsx’ file, so we cannot specifically help you with it. Nevertheless, try this:
polarplot(t, r, 'g', 'markers',20);
4 个评论
fati jadid
2018-10-24
Star Strider
2018-10-24
It does plot. There is a tight cluster of dots at 79.47° at a radius of about 38.31:
figure
polarplot(t, r, '.g');
If you first subtract the mean of the two vectors, you get a result that is likely closer to what you want to see:
[t,r] = cart2pol(x-mean(x),y-mean(y));
figure
polarplot(t, r, '-g');
fati jadid
2018-10-24
Star Strider
2018-10-24
My pleasure.
If my Answer helped you solve your problem, please Accept it!
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