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Point out a specific value in a plot.

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Devdatt Thengdi
Devdatt Thengdi 2017-12-6
评论： KSSV 2017-12-6
Following is the code to minimize a Sol over Q. The minimized value is obtained at Qmin. I want to plot Qmin on the plot for Q vs Sol. At the least tell me how to determine how look for its data point in the Q array.
x1 = 5900000;
x2 = 8800000;
Qmin = fminbnd(@Sol, x1, x2);
Qmin
disp(Qmin);
Q = 5900000:10000:8800000;
diff = Sol(Q);
diffQ = Sol(Qmin);
plot (Q,diff)
xlabel('Assumed Flux(Q)');
ylabel('Assumed Flux(Q) - Obtained Flux(qr)');

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回答（1 个）

KSSV
KSSV 2017-12-6
Easy no...use plot and hold on
  2 个评论
Devdatt Thengdi
Devdatt Thengdi 2017-12-6
Sorry. I am a newb. I've tried plot hold on but, we need a specific data point number of Qmin to point it out in the plot.
KSSV
KSSV 2017-12-6
Read about find and logical indexing.

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