Problem with for loop

for i = 1:19

P(i) = [2.8*10^-4:0.1*10^-4:4.2*10^-4]

I cannot figure out how to fix my loop

[Jacob]

for i = 1:15*****

[dpb]

From what you're showing, you don't need (or want) a loop at all.

doc colon

and read the "Getting Started" section in help on manipulating arrays in Matlab to begin to get the picture.

[per isakson]

    P = [2.8e-4:1e-5:4.2e-4];

and

    P = [2.8*10^-4:0.1*10^-4:4.2*10^-4];

return identical results.

Answer 1

[Rick Rosson]

No need for a for loop, no need for square brackets. Also, might as well pull common scale factor out using distributive property:

P = (2.8:0.1:4.2)*1e-4;

[Jacob]

Thanks for your help, but I apologize I did not put the entire code on the question yesterday.

for i = 1:15

    P = 2.8e-4:.1e-4:4.2e-4; ???

    Kw(i) = 10^-14;
    Kh(i) = 10^-1.46;
    Ka1(i) = 10^-6.3;
    Ka2(i) = 10^-10.3;

    func(i) = @(ph,P)Kw/(10^-ph)+(Ka1*Kh*P)/(10^-ph)+(2*Ka1*Ka2*Kh*P)/(10^-ph)^2-(10^-ph);

    ph(i) =7;
    xl(i) = -20;
    xu(i) = 20;
    es(i) = 0.1;

    [ phout(i), iter(i) ] = bisect( func,xl,xu,es,P )

end