how to plot y double right axis linear graph?

x = [162 132 190 470 187 157 215 495 165 135 193 473 302 272 330 610 942 912 970 1250];

y1 = [1.21 0.491; 0.938 0.388; 0.237 0.159; 0.379 0.158; 0.45 0.182; 0.43 0.179; 0.382 0.091; 0.433 0.177; 0.933 0.34; 0.261 0.244; 0.092 0.038; 0.0406 0.016; 0.357 0.156; 0.193 0.101; 0.097 0.063; 0.0972 0.0371; 0.259 0.139; 0.176 0.072; 0.076 0.031; 0.0777 0.0324];

y2 = [21.7 50.89 57.86 45.62 3.62 35.03 36.72 45.52 48.37 54.29 70.18 66.63 64.32 65.18 77.83 98.25 67.49 70.4 35.34 99.2];

figure('Color','w')

[hAx,hLine1,hLine2] = plotyy(x,y1,x,y2);

xlabel ('cost(USD)')

ylabel(hAx(1),'value (m)') % left y-axis

ylabel(hAx(2),'solution Percentage (%)') % right y-axis

grid on

Y2axis right

ax.Ylable(hAx(2)).Color = 'r';

Answer 1

[Prakash S R]

What exactly is the problem? I'm guessing that you are bothered by the fact that the line connecting the points is all squiggly, because the x points are not in increasing order. Maybe if you sorted x and replotted, you'll find a more meaningful plot:

[sx, inds] = sort(x);
[hAx,hLine1,hLine2] = plotyy(sx,y1(inds),sx,y2(inds));