Effacer les filtres
Effacer les filtres

(i) x-and-y scales defined as "log", or (ii) calculate the log of variables, or (iii) loglog

3 vues (au cours des 30 derniers jours)
Are these three methods (and the corresponding plots) equivalent ways to perform the same task ?
% Method 1
figure
axes('XScale', 'log', 'YScale', 'log')
plot(1:10, 1:10)
title('plot(1:10, 1:10), with both x-and-y scales defined as "log"')
% Method 2
figure
plot(log(1:10), log(1:10))
title('plot(log(1:10), log(1:10))')
% Method 3
figure
loglog(1:10, 1:10)
title('loglog(1:10, 1:10)')

Réponse acceptée

VBBV
VBBV le 9 Mai 2023
% Method 1
figure
plot(1:10, 1:10)
ax = gca;
% put this after plot call and use as below
set(ax,'XScale', 'log', 'YScale', 'log')
title('plot(1:10, 1:10), with both x-and-y scales defined as "log"')
% Method 2 -->>>> Linear scale but log values of inputs
figure
plot(log(1:10), log(1:10))
title('plot(log(1:10), log(1:10))')
% Method 3
figure
loglog(1:10, 1:10)
title('loglog(1:10, 1:10)')
  1 commentaire
VBBV
VBBV le 9 Mai 2023
Modifié(e) : VBBV le 9 Mai 2023
Method 1 and Method 3 are equivalent but Method 2 is not same as remaining two methods, since Method 2 plots the logarithm of input values on linear scale , while Method 1 uses log scale for plotting linear values, and Method 3 also does same

Connectez-vous pour commenter.

Plus de réponses (1)

Antoni Garcia-Herreros
Antoni Garcia-Herreros le 9 Mai 2023
No,
Method 1 and 3 are equivalent. The X and Y values range from 1 to 10, it does not matter which scale you use, the values remain the same.
% Method 1
subplot(1,3,1)
plot(1:10, 1:10)
title('plot(1:10, 1:10), with both x-and-y scales defined as "log"')
ax=gca;
ax.XScale= 'log'; ax.YScale = 'log';
title('Method 1')
% Method 3
subplot(1,3,3)
loglog(1:10, 1:10)
title('Method 3')
However, in Method 2 the X, Y values change from 0 to 2.3...
% Method 2
subplot(1,3,2)
plot(log(1:10), log(1:10))
title('Method 2')
  1 commentaire
Sim
Sim le 12 Mai 2023
Thanks a lot both @VBBV and @Antoni Garcia-Herreros for your nice answers! PLease bear in mind that I would accept both of them if I could! :-)

Connectez-vous pour commenter.

Catégories

En savoir plus sur Log Plots 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!

Translated by