How to combine two trendlines from two different plot?
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I have array data. Let's say time, x, and y. They are all 117*1 array. Then i make plots. And then i add a trendline for each plot using polyfit.
aa=polyfit(time,x,1);
bb=polyval(aa,time);
figure
plot(time,x)
hold on
plot(time,bb)
cc=polyfit(time,y,1);
dd=polyval(cc,time);
figure
plot(time,y)
hold on
plot(time,dd)
So then i have 2 figures with 2 trendlines. I have a trouble about how to combine these two trendline in one figure. So that i can calculate the angle between the trendlines. Thank you..
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