vector notation with data from struct array

I have the following problem: I want to operate with variables from my workspace which I saved in a struct array. This will be the argument for a self defined function which you can see in the following:

t_abtast = 2;
data = load('GMapsRoute02182022095722SimulationRun.mat')
v = data.GMapsRoute02182022095722SimulationRun.velocity_kmh(1:10:end)';
a = data.GMapsRoute02182022095722SimulationRun.acc(1:10:end)';
t = data.GMapsRoute02182022095722SimulationRun.t(1:10:end);
E = data.GMapsRoute02182022095722SimulationRun.energy(1:10:end)';

v = v(~isnan(v));
a = a(~isnan(a));
E = E(~isnan(E));

v = smooth(v);
a = smooth(a);
E = smooth(E);

v = v(1:t_abtast:end);
a = a(1:t_abtast:end);
t = t(1:t_abtast:end);
E = E(1:t_abtast:end);

t_delta = t(2)-t(1);
P = [0, diff(E)/t_delta];              
adot = [0, diff(a)/t_delta];

[A,B,X,Y,y,res,x_vec,x_pred,u_pred] = DMDc1(5,10,4,v,a,adot,P);

...

I get this error message:

Error using horzcat

Dimensions of arrays

being concatenated are

not consistent.

Error in DMD_Prediction

(line 42)

P = [0

diff(E)/t_delta];

Before I loaded the variables with the evalin function and there was not problem.

load('GMapsRoute02182022095722SimulationRun.mat')
v = evalin('base','GMapsRoute02182022095722SimulationRun.velocity_kmh');
a = evalin('base','GMapsRoute02182022095722SimulationRun.acc');
t = evalin('base','GMapsRoute02182022095722SimulationRun.t');
E = evalin('base','GMapsRoute02182022095722SimulationRun.energy');

When I change the notation from "," to ";", I receive the following error:

Unable to perform assignment because the size of the left side is 4-by-239

and the size of the right side is 972-by-0.

Error in DMDc1 (line 71)

X((ii-1)*states+1:ii*states,:) = y(:,ii:end-n+ii);

Error in DMD_Prediction (line 47)

[A,B,X,Y,y,res,x_vec,x_pred,u_pred] = DMDc1(5,10,4,v,a,adot,P);

So, this rewriting leads to problem later in the code.

Answer 1

[Matt J]

Error in DMD_Prediction (line 42)

P = [0

diff(E)/t_delta];

In all likelihood diff(E) is not a row vector. THat should be easy to check.

[benjamin pommer]

Thank you. I could solve it

[Matt J]

You're welcome, but please Accept-click the answer if it resolved your question.