Decreasing scale on graphs

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David
David 2011-3-11
I wish to graph Time Decay for an option price from 1 year to almost 1 day. The graph generated by MATLAB scales from 0 to 1 and I need 1 to 0.
Interval = 1/252;
Times = 1:-Interval:Interval;
[TDCall TDPut] = blsdelta(S0,K,r,Times,Sigma);
plot(Times,TDCall);

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回答（3 个）

Jan
Jan 2011-3-11
Can you change the values of the time?
plot(1 - Times, TDCall);
Perhaps FLIPLR is wanted to reorder TDCall?
Walter Roberson
Walter Roberson 2011-3-11
Okay, this is going to be a hack, but it'll get the job done for now:
plot(-Times,TDcall);
set(gca, 'XTickLabel', -get(gca, 'XTick'))
Tested, and it works.
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Walter Roberson
Walter Roberson 2011-3-12
True, and surmountable using known methods.
Good enough for someone who was falling asleep at the time.
David
David 2011-3-13
Thanks for your help.

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Ned Gulley
Ned Gulley 2011-3-11
Is this what you're looking for?
plot(Times,TDCall)
set(gca,'XDir','reverse')

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