Matrix dimensions must agree error

1 次查看（过去 30 天）
Ryan DiTullio
Ryan DiTullio 2019-11-19
回答： Walter Roberson 2019-11-22
I am trying to graph P as a function of the 4 variables listed, but before I can even get to the graph I keep getting the error message Matrix dimensions must agree:
t=[1:1:5];
V=[1000:1:2500];
D=[2:1:5];
A=[1:1:6];
P=(1+(1./t)).*V.*((D./2)+A);
  1 个评论
Walter Roberson
Walter Roberson 2019-11-19
No two of your variables are the same size. What size are you expecting the output to be? 5 x 1501 x 4 x 6 ?

请先登录，再进行评论。

请先登录，再回答此问题。

回答（2 个）

Urmila Rajpurohith
Urmila Rajpurohith 2019-11-22
Addition and element wise multiplication is possible only with matrices of same dimensions.
Try to make sure your matrices are of required sizes by padding them with either 0's or 1's if possible.
Walter Roberson
Walter Roberson 2019-11-22
t=[1:1:5];
V=[1000:1:2500];
D=[2:1:5];
A=[1:1:6];
[tg, Vg, Dg, Ag] = ndgrid(t, V, D, A);
P = (1+(1./tg)).*Vg.*((Dg./2)+Ag);
The result will be a 4D array, 5 x 1501 x 4 x 6 . You will have a fair bit of difficulty plotting the result, as it requires 5 dimensions to represent (four independent dimensions and one dependent dimension.)

类别

在 Help Center 和 File Exchange 中查找有关 Resizing and Reshaping Matrices 的更多信息

标签

产品


版本

R2019b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by