Invalid index showing Index exceeds the number of array elements. Index must not exceed 1.

a(1)=1;

b(1)=1;

c(1)=1;

S=0;

Z=0;

for i=1:20

for p=1:i-1

a(i+1)=(1/(i+1))*(a(i)-b(i));

S=S+a(p)*c(i-p);

b(i+1)=(1/(i+1))*(a(i)-S-b(i));

Z=Z+a(p)*b(i-p);

c(i+1)=(1/(i+1))*(Z-c(i));

disp([S Z])

end

end

Index exceeds the number of array elements. Index must not exceed 1.

display is showing

[Jan]

@shiv gaur: You have been asked repeatedly to use a proper code formatting. Please read an consider this: https://www.mathworks.com/matlabcentral/answers/help/rtc#rtc_summary . Thanks.

Answer 1

[Torsten]

For i=1, the p-loop is empty since your loop index goes from p=1:i-1.

Thus for i=1, a(i+1) = a(2), b(i+1) = b(2) and c(i+1) = c(2) will not be defined.

But for i=2, you refer to a(2), b(2) and c(2) in the p-loop in the expressions for a(3), b(3) and c(3). This causes the error.

[shiv gaur]

the value of a(2) from a(1)

see a(2)=(1/(2))*(a(1)-b(1)); a(1)=0;b(1)=1;

so a(2)=0.5; so pl resolve the problem

[Torsten]

The p-loop for i=1 goes from 1 to 0, so is never executed. Thus a(2), b(2) and c(2) are never computed.

[shiv gaur]

so how we change the program for looping

[shiv gaur]

this is interesting problem

[shiv gaur]

this is runnig program but iI am not sure about the right value

a(1)=0;

b(1)=1;

c(1)=0;

z=0;

s=0;

for i=1:20

for p=1:1:i-1

s=s+(a(p)*c(i-p))

z=z+(a(p)*b(i-p))

c(i+1)=(1/(i+1))*((z-c(i)));

b(i+1)=(1/(i+1))*((a(i))-(b(i))-(s));

a(i+1)=(1/(i+1))*(a(i)-b(i));

end

end

disp([s z])

[Torsten]

Same problem.

For i=2, a(2), b(2) and c(2) are not defined in the p-loop.

[shiv gaur]

these value is calculating of a

0 -5 -6.30000000000000 0 0 0.666666666666667 0.917460317460317 0.679464285714286 1.76724537037037 3.61381728395062 4.58679047619048 4.63825651354818 4.15368697994392 3.19579021030777 2.00242391635713 0.291489163579492 -2.33500140220331 -5.80374096827983 -9.69659556190971 -13.4963906941167 -16.7058111219242

[shiv gaur]

the b=1 13.9000000000000 -6.30000000000000 0 -4 -5.75555555555556 -4.51825396825397 -15.2257440476190 -34.3709274691358 -46.8408779541446 -51.0722876863877 -49.3596742257228 -40.5873759643649 -26.8405685350492 -2.66140270091474 39.9865130010358 102.132336026834 178.431574708005 260.231218320425 337.325642866291 399.549875535635

c=0 -4 1.33333333333333 -1.58333333333333 -15.8433333333333 -20.1711111111111 -11.0012698412698 -8.18900793650794 -0.462491181657851 5.61944951499118 14.5580066939234 36.6839647971113 69.6154752977938 104.081836633943 133.712421128828 153.568117200845 160.420885617651 151.229533665538 118.203632216898 51.7351169336947 -53.8915915123066

[Torsten]

Where should the -5 for a(2) come from ? Not from the code above - that's for sure.

Maybe you initialized a, b and c as zeros(21,1) ?

[shiv gaur]

the value of a(2) from

a(i+1)=(1/(i+1))*(a(i)-b(i));

for i=1; a(1)=0;b(1)=1; pl you are req to correct the program

a(2)=(1/2)*(a(1)-b(1))

[Torsten]

for p=1:1:(1-1)

means that the p-loop is not entered, and this is the case for i=1.

I can't correct your program since I don't know what your program is supposed to do.

[shiv gaur]

a(1)=0;

b(1)=1;

c(1)=0;

z=0;

s=0;

for i=1:20

for p=1:1:i-1

s=s+(a(p)*c(i-p))

z=z+(a(p)*b(i-p))

c(i+1)=(1/(i+1))*((z-c(i)));

b(i+1)=(1/(i+1))*((a(i))-(b(i))-(s));

a(i+1)=(1/(i+1))*(a(i)-b(i));

end

end

pl the program

[shiv gaur]

the p loop for calculating the value of s and z ie

s=s+sum(a(p)*c(i-p));z=s+sum(a(p)*b(i-p))

first how to calculate the z s form this because this is complexity of s z