Simple Loop Question - Topic

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Sep 24 2012 04:06pm

say you have a function

y=10+2k

so when
k=0, y=10
k=1, y=12
k=2, y=14

im trying to make a loop so that the current function is added to the previous function

so when k is equal to 2 it should output 26

it would be best to code in python please

to be more specific... im trying to make it so that the function S keeps adding to its previous function in the loop untill Sp1-S>0.01

Code

function S=matcos(A)

k=0;
S= (-1)^(k)*A^(2*k)/factorial(2*k)
Sp1= (-1)^(k+1)*A^(2*(k+1))/factorial(2*(k+1))

while somefunc max(abs(Sp1-S))>0.01;

k=k+1;
Sp1=S+%something
end
end

This post was edited by xMaxPower on Sep 24 2012 04:16pm

carteblanche

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Sep 24 2012 04:16pm

sum = 0

for i in range (0, 2):
sum += 10 + 2 * i

something to that effect

0th1ng

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Sep 24 2012 07:09pm

Code

function S=assign1testing(A)

k=1;
Sp1=0;
S= (-1)^(k)*A^(2*k)/factorial(2*k);

while abs(max(Sp1-S))>0.01;

Sm1= (-1)^(k-1)*A^(2*(k-1))/factorial(2*(k-1));
S=S+Sm1;
k=k+1;
Sp1=S+(-1)^(k+1)*A^(2*(k+1))/factorial(2*(k+1));

end

end

carteblanche

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Posts: 32,925

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Sep 24 2012 07:16pm

you said that's python? the function header looks more like matlab than python imo. you have some strange syntax which i'm not sure is correct, but i dont know what language that's in. for example, you have a semi colon at the end of the while loop. and you use ^ which i'm not 100% what it does in python. i assume it does bitwise xor since ** is exponentiation.

This post was edited by carteblanche on Sep 24 2012 07:21pm

0th1ng

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Sep 24 2012 09:07pm

Quote (carteblanche @ Sep 25 2012 01:16am)

it was actually matlab. i dont no why but i thot no1 would no what it was so i was just gonna translate python to matlab. i dont need help anymore tho thx

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