Semilogy with two functions - how to make it work?
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I have two functions, y1 and y2, both of which are quadratic functions. I'm trying to graph them on the same plot, with the y-axis being on a logarithmic scale instead of a linear scale. I know how to get just one of the functions to have a log scale on the y axis, but whenever I have two functions involved, the y-axis reverts to a linear scale. I have the code I've been using below; how might I format the semilogy so that the plot will have both functions graphed while still having the y-axis as a logarithmic scale? Any help would be appreciated.
Code:
x1=0:0.1:50;
x2=0:0.1:50;
y1=15*(x1.^2);
y2=80*(x2.^2);
semilogy(y1,y2)
plot(x1,y1,'-','LineWidth',3,'Color','k')
hold on
plot(x2,y2,'-','LineWidth',3,'Color','k')
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the cyclist
le 16 Sep 2013
x1=0:0.1:50;
x2=0:0.1:50;
y1=15*(x1.^2);
y2=80*(x2.^2);
figure
hold on
semilogy(x1,y1,'-','LineWidth',3,'Color','k')
semilogy(x2,y2,'-','LineWidth',3,'Color','k')
1 commentaire
Connor Williams
le 25 Sep 2019
This is incorrect. If you initiate the figure with figure and hold on commands before the semilogy command, the figure remains with linear axes.
Chris
le 16 Sep 2013
1 commentaire
the cyclist
le 16 Sep 2013
Just for your future reference, your remark would have been better placed as a "comment" on my answer (rather than as a new "answer"). You might also consider accepting my answer if it was helpful to you, which may be useful for future users looking for something similar.
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