Subscript indices must either be real positive integers or logicals.
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Dear All,
I got this error "Subscript indices must either be real positive integers or logicals" when using Matlab. Please help me how to fix this error and regrid my data. Below show my code.
L=28.3;
B=7.08;
T=2.64;
H=3.42;
delta=0.561;
alpha=0.83;
beta=0.861;
vs=11;
om=L*(T+B/2)*(0.55+1.52*delta);
v0=vs*0.5144;
for i=1:0.1:1.5
v=v0*i;
fr=v/(9.81*L)^0.5;
Re=v*L/16.1;
CF0=10^3*0.455*(log10(Re*10^7)).^(-2.58);
Ca=0.5;
Cap=0.25;
Pdv=(L*B*T*delta*1.025)^(1/3)*vs^4.5/554.7;
% зависимость Cr от L/B
a1=L/B;
y1=[0.21 0.23 0.25 0.27 0.29 0.31 0.34 0.36 0.37];
e1=[3.5 3.75 4 4.25 4.5 4.75];
f1=[1.2 1.17 1.15 1.11 1.05 0
1.48 1.46 1.35 1.31 1.27 1.2
1.89 1.86 1.78 1.75 1.68 1.58
2.4 2.35 2.32 2.24 2.15 2.03
2.92 2.89 2.81 2.73 2.62 2.5
3.55 3.5 3.42 3.31 3.2 3.02
5 4.8 4.66 4.51 4.19 3.82
6.78 6.45 6.08 5.72 5.38 4.92
7.81 7.51 7 6.57 6.12 5.76];
c1=interp2(e1,y1,f1,a1,fr);
% зависимость Cr от B/T
a2=B/T;
y2=[0.21 0.23 0.25 0.27 0.29 0.31 0.35 0.36 0.37];
e2=[2.3 2.5 2.7 2.9 3.1];
f2=[1.38 1.34 1.29 1.21 1.1
1.57 1.55 1.52 1.49 1.45
1.98 1.97 1.94 1.89 1.79
2.47 2.45 2.41 2.34 2.25
2.98 2.97 2.94 2.89 2.79
3.58 3.55 3.51 3.46 3.32
4.28 4.23 4.16 4.08 3.99
5.48 5.41 5.34 5.21 5.04
7.18 7.06 6.95 6.86 6.74];
c2=interp2(e2,y2,f2,a2,fr);
% Зависимость Cr от beta
a3=beta;
y3=[0.21 0.23 0.25 0.27 0.29 0.31 0.34 0.36 0.37];
e3=[0.7 0.75 0.8 0.85 0.9];
f3=[1.1 1.12 1.14 1.17 1.26
1.46 1.49 1.53 1.55 1.59
1.85 1.89 1.92 1.96 2
2.16 2.27 2.35 2.42 2.58
2.8 2.84 2.87 2.97 3.38
3.19 3.29 3.48 3.52 4
4.08 4.48 4.54 4.8 5.28
5.4 5.78 5.92 6.1 6.76
6.2 6.65 6.83 7.27 7.88];
c3=interp2(e3,y3,f3,a3,fr);
% Зависимость Cr от xc
a4=0;
y4=[0.21 0.23 0.25 0.27 0.29 0.31 0.34 0.36 0.37];
e4=[-0.025 -0.02 -0.015 -0.01 -0.005 0 0.005 0.01];
f4=[1.15 1.15 1.15 1.15 1.15 1.15 1.15 1.15
1.5 1.52 1.54 1.56 1.58 1.61 1.65 1.7
1.76 1.79 1.84 1.89 1.96 2 2.05 2.1
2.05 2.11 2.2 2.36 2.48 2.58 2.68 2.78
2.57 2.67 2.77 2.87 2.99 3.08 3.19 3.38
2.95 3.08 3.31 3.46 3.62 3.8 4 4.08
3.86 4.06 4.4 4.62 4.95 5.1 5.42 5.63
5.04 5.41 5.79 6.03 6.34 6.58 6.85 7
6.1 6.47 6.75 7 7.32 7.5 7.71 7.82];
c4=interp2(e4,y4,f4,a4,fr);
% Зависимость Cr от коэффициент ф и ф0
a5=delta/beta;
y5=[0.21 0.23 0.25 0.27 0.29 0.31 0.34 0.36 0.37];
e5=[0.575 0.6 0.625 0.65 0.675];
f5=[1.04 1.1 1.25 1.47 1.74
1.47 1.56 1.73 1.9 2.06
1.83 1.94 2.04 2.37 2.55
2.05 2.3 2.65 2.98 3.3
2.55 2.9 3.45 3.98 4.77
3 3.5 4.12 5 6
4.18 4.7 5.42 6.38 7.48
5.81 6.1 6.55 7.43 8.5
6.82 7 7.56 8.35 9.28];
c5=interp2(e5,y5,f5,a5,fr);
a6=0.6;
c6=interp2(e5,y5,f5,a6,fr);
Cr=(c1.*c2.*c3.*c4.*c5)./(c6.^4);
C=CF0+Ca+Cap+Cr'
R=C.*1.025.*(v.^2)*om*0.5
% определение требуемой мощности при травлении
Rtr=R/10^3+40;
t=0.078;
w=0.078
n1=0.55;
n2=0.96;
n3=0.99;
n=n1*n2*n3*(1-t)/(1-w);
Pdtr=v*Rtr/n;
load Marineengine.mat
En = [engine.Mass;engine.Power; engine.Length ];
kp = En(2,:)./Pdtr;
np = find(kp > 1.05 & kp <1.2);
[n1,m1] = min(En(1,np));
k=engine(np(m1(1,end)));
Mdv = En(1,np(m1(1,end)));
N = En(2,np(m1(1,end)))
l = En(3,np(m1(1,end)));
kp2=N/Pdtr;
if kp2 > 1.05 & kp2 <1.2
N1=N;
break
end
end
Thank you very much,
Best regards
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採用された回答
the cyclist
2019 年 12 月 10 日
編集済み: the cyclist
2019 年 12 月 10 日
In this line:
np = find(kp > 1.05 & kp <1.2);
there are no values of kp that satisfy this condition, so np is empty.
That carries through the code until you get the error you saw.
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