semilogy, loglog do not work in order to set the y axis on a logarithmic scale
27 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
I am working on a numerical algorithm and I want to plot the error for 5 different shape parameters of my function. I want all the plots to figure on one same figure.
Here is the code that I use:
figure
hold on
for i=3:7
[coord_ctrs, errors] = ApproxAdap1D(i);
semilogy(coord_ctrs, (errors));
title("Senkung des RMS Fehlers");
grid;
end
Result:
As you can see, it does not work, the y axis does not have a logarithmic scale. loglog function displays tthe same result too.
0 commentaires
Réponse acceptée
Plus de réponses (1)
Dave B
le 12 Sep 2021
When you use the log plotting functions they don't change the axis scale if hold is on. There's a note all the way at the bottom of the documentation pages (oddly, in algorithms). Here's the one from the semilogx page:
The semilogx function plots x-coordinates on a log scale by setting the XScale property of the axes to 'log'. However, if the axes hold state is 'on' before you call semilogx, the property does not change, and the x-coordinates might display on a linear scale.
Fortunately you can just set the relevant scale property:
hold on
for i = 1:3
plot(1:10,2*(rand(10,1)*i))
end
set(gca,'YScale','log')
0 commentaires
Voir également
Catégories
En savoir plus sur Axis Labels dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!