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Error: Array indices must be positive integers or logical values

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Trine Høy Oddershede
Trine Høy Oddershede on 5 Mar 2021
%% Inputs
Q = 0.16; %[m^3/s] flowraten
r_2 = 0.25; %[m]Ydre radius
D_2 = 0.50 %[m]Ydre diameter
b_2 = 0.5 %[m]Blad højden
beta_2 = 75 %[grader] vinklen
U_2 = (r_2 * omega) * 2*pi * 1/60
%Head
H_plot = zeros(50,1);
for Q = 1:1:50;
H = (U_2^2*Q/g - U_2/(pi*D_2*b_2*g*tand(beta_2))); % [m] Beregning af head
H_plot(i)= H;
i = i+1;
end
why do i get this error message: Array indices must be positive integers or logical values
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Answers (1)

KALYAN ACHARJYA
KALYAN ACHARJYA on 5 Mar 2021
Q = 0.16; %[m^3/s] flowraten
r_2 = 0.25; %[m]Ydre radius
D_2 = 0.50 %[m]Ydre diameter
b_2 = 0.5 %[m]Blad højden
beta_2 = 75 %[grader] vinklen
%Define Omega and g
omega=
g=
Remaining code (Loop can be avoided here)
U_2=(r_2 * omega) * 2*pi * 1/60
Q = 1:1:50;
H = (U_2^2*Q./g - U_2/(pi*D_2*b_2*g*tand(beta_2)));
plot(H,Q);

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