create a log space vector

i want to create a log spaced vector consisting of 26 points starting at 2300. my problem is i don't know what the final point is so i can't use logspace (logspace(2300,b,26)) but i don't know what b is. what other command can i use?

[Fangjun Jiang]

That is strange. Then, what is the "distance" between your points? You say starting from 2300, what is the value of 2nd, 3rd, etc. points? Do you have any idea?

[Sean Smith]

I'm an idiot i read the question wrong but I am still not sure hot do it. It deals with moore's law about transistors. I need to start at 2300 in 1971 than i need it to double every 2 years until 2008. So i need a vector starting at 2300 and it double 19 times.

Answer 1

[Fangjun Jiang]

Okay, then I think what you need is:

a=0:19;
b=2.^a;
c=2300*b;

[Sean Smith]

thanks i appreciate it. if you have time can you look at this question

http://www.mathworks.com/matlabcentral/answers/17249-setting-up-a-step-function

completely lost on it.