MATLAB Answers

Array indices must be positive integers or logical values.

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Lorenzo Reda
Lorenzo Reda on 14 Mar 2021
Answered: Star Strider on 14 Mar 2021
Pls tell me where is the error.
for i= 0.01:0.02:0.99
w1_temp= i;
w2_temp= 1-i;
Rp_temp= w1_temp*mean(R_2(:,1))+w2_temp*mean(R_2(:,2));
Sp_temp= sqrt((w1_temp^2)*var(R_2(:,1))+(w2_temp^2)*var(R_2(:,2))...
+2*w1_temp*w2_temp*C(2,1));
figure(5)
L(1)=plot(Sp_temp,Rp_temp,'bx','MarkerSize',7);
hold on
xlim([0 2]);
ylim([0 0.12]);

Answers (2)

madhan ravi
madhan ravi on 14 Mar 2021
ii = 0.01:0.02:0.99;
w1_temp= ii;
w2_temp= 1-ii;
Rp_temp= w1_temp*mean(R_2(:,1))+w2_temp*mean(R_2(:,2));
Sp_temp= sqrt((w1_temp.^2)*var(R_2(:,1))+(w2_temp.^2)*var(R_2(:,2))...
+2*w1_temp.*w2_temp*C(2,1));
figure(5)
plot(Sp_temp,Rp_temp,'bx','MarkerSize',7);
xlim([0 2])
ylim([0 0.12])

Star Strider
Star Strider on 14 Mar 2021
Not able to run the posted code:
Unrecognized function or variable 'R_2'.
That aside, be absolutely certain that you have not created variables named ‘mean’, ‘sqrt’, ‘var’, ‘plot’. ‘xlim’,’ylim’ or ‘C’, since creating those variables would throw the (unposted object) error.
Cannot go further without more information.

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