I didn't know how to define my vector

Hello,

I have a problem when I define my vector Et, because Et include in my interval E. I know that is not normal, my purpose is to have many values of mobility according to Et.

My program :

% Main Principal :
% Data:
sigma=0.1;                       % energy scale of the disorder (eV)
e=1.6e-19;
N=10.^26;                        % the concentration of localized states (m^3)
E_LUMO=0;
K_B=8.625e-5;                    % Boltzmann constant (eV/K)
T=300;                           % Témperature Ambiante (K)
Bc=2.735;                        % average number of sites within the sphere of radius rc around a given site 
Alpha=0.215*N.^(-1./3);          % the localization length (m)
Ef=E_LUMO-0.5;                   % Fermi energy (eV)
F_ER=1;                          % the function FER derived by Roichman and Tessler
Frequence_0=10^12;               % frequency (Hz)

E1=-10*sigma;                    % starting value of integrale (eV)
N_0=1000;                        % Number of points
Et=0:-0.01:-0.5;
E=linspace(E1,Et,N_0);
for i=1:size(Et)
    [Gauss]=densite_Gaussienne(N,sigma,E,E_LUMO);
    [S_F_D]=statistque_Fermi_Dirac(E,Ef,K_B,T);
    [Multi_G_F_D]=multiplication_G_D(Gauss,S_F_D);
    [nt]=concentration_t(E,Multi_G_F_D);
    [r_E_t]=radius(Bc,E,Gauss);
    [Mobility]=mo_bi_li_ty(Frequence_0,e,K_B,T,Bc,F_ER,r_E_t,nt,Alpha,Et,Ef);
end

I received this problem:

Error using  .* 
Matrix dimensions must agree.

Error in linspace (line 30)
    y = d1 + (0:n1).*(d2 - d1)/n1;

Error in Model_with_Loop_For (line 15)
E=linspace(E1,Et,N_0);

Please, can someone help me.

Best regard;

[Guillaume]

Hum, that is puzzling, the error you get would occur if one of the inputs to linspace wasn't scalar, but linspace does check that the inputs are scalar.

What are the values of E1, Et, and N_0 that cause this error?

[MAROUANE ENNAGADI]

The problem is Et , because it is a vector, I think in linspace we can not put a vector like a point.

The value of E1=-10*sigma; and sigma=0.1; N_0=1000;

[Star Strider]

@Marouane — What are the arguments to linspace? None of them appear to be defined before the linspace call, at least in the code you posted.

[MAROUANE ENNAGADI]

E1=-10*sigma;                    % starting value of integrale (eV)
N_0=1000;                        % Number of points
Et=0:-0.01:-0.5;
E=linspace(E1,Et,N_0);

Answer 1

[Guillaume]

In my version of matlab (R2019a), passing a vector to linspace give the following error:

Error using linspace (line 22)
Inputs must be scalars.

which makes more sense than the error you see. In any case, the cause of your error is the same, linspace is not designed to work with vector inputs since its whole purpose is to return a vector of values linearly spaced between two values.

If you tell us what you're hoping to get when one (or more) input is a vector we can tell you how to do it.