# How to make surf plot have different x scales?

2 vues (au cours des 30 derniers jours)
Sharon le 19 Nov 2023
Commenté : Voss le 20 Nov 2023
Hi there,
I have plotted a 2D graph using the surf(x,t,w) function first and then using the view(2) commend. The W is a 2000x11matrix. x denotes space and is the 1x11 vector. t denotes time and is the 1x2000 vector. Now I want to rescale space x. For each time t, x is rescaled differently. For example, when t=t_1, x is rescaled to 1.2x (each element in the vector x is multiplied by 1.2); when t=t_2, x is rescaled to 1.5x (each element in the vector x is multiplied by 1.5); and so on. How can I achieve this? Any help would be appreciated! Attached is the graph I get.
##### 0 commentairesAfficher -2 commentaires plus anciensMasquer -2 commentaires plus anciens

Connectez-vous pour commenter.

### Réponse acceptée

Voss le 19 Nov 2023
% define t,x,W variables:
Nx = 11;
Nt = 2000;
W = (Nx:-1:1).*(Nt:-1:1).'/4500;
t = linspace(0,200,Nt);
x = linspace(0,1,Nx)
x = 1×11
0 0.1000 0.2000 0.3000 0.4000 0.5000 0.6000 0.7000 0.8000 0.9000 1.0000
% plot original:
figure
surf(x,t,W,'EdgeColor','none')
view(2)
xlabel('x')
ylabel('t')
colormap(jet())
colorbar
title('original')
% generate factors to multiply x by, one for each element of t:
x_factor = 1.2+0.3*(0:Nt-1) % 1.2, 1.5, and so on
x_factor = 1×2000
1.2000 1.5000 1.8000 2.1000 2.4000 2.7000 3.0000 3.3000 3.6000 3.9000 4.2000 4.5000 4.8000 5.1000 5.4000 5.7000 6.0000 6.3000 6.6000 6.9000 7.2000 7.5000 7.8000 8.1000 8.4000 8.7000 9.0000 9.3000 9.6000 9.9000
% make matrices called tt (from t) and xx (from x and x_factors)
% t gets replicated:
tt = repmat(t(:),1,Nx);
% x gets multiplied by the factors:
xx = x.*x_factor(:)
xx = 2000×11
0 0.1200 0.2400 0.3600 0.4800 0.6000 0.7200 0.8400 0.9600 1.0800 1.2000 0 0.1500 0.3000 0.4500 0.6000 0.7500 0.9000 1.0500 1.2000 1.3500 1.5000 0 0.1800 0.3600 0.5400 0.7200 0.9000 1.0800 1.2600 1.4400 1.6200 1.8000 0 0.2100 0.4200 0.6300 0.8400 1.0500 1.2600 1.4700 1.6800 1.8900 2.1000 0 0.2400 0.4800 0.7200 0.9600 1.2000 1.4400 1.6800 1.9200 2.1600 2.4000 0 0.2700 0.5400 0.8100 1.0800 1.3500 1.6200 1.8900 2.1600 2.4300 2.7000 0 0.3000 0.6000 0.9000 1.2000 1.5000 1.8000 2.1000 2.4000 2.7000 3.0000 0 0.3300 0.6600 0.9900 1.3200 1.6500 1.9800 2.3100 2.6400 2.9700 3.3000 0 0.3600 0.7200 1.0800 1.4400 1.8000 2.1600 2.5200 2.8800 3.2400 3.6000 0 0.3900 0.7800 1.1700 1.5600 1.9500 2.3400 2.7300 3.1200 3.5100 3.9000
% plot rescaled result:
figure
surf(xx,tt,W,'EdgeColor','none')
view(2)
xlabel('x')
ylabel('t')
colormap(jet())
colorbar
title('rescaled')
##### 2 commentairesAfficher AucuneMasquer Aucune
Sharon le 20 Nov 2023
Hi Voss, thank you very much for answering my question. It is very helpful. I have a question. What is the variable W you defined? Could you explain it a little? Thanks.
Voss le 20 Nov 2023
You're welcome!
The variable W I have defined is just some matrix I made up, since I don't have your W.

Connectez-vous pour commenter.

### Catégories

En savoir plus sur Graphics Object Properties 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