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I am looking for a site that will give me the output of my logarithms.

What I want to do, is I want to input, in example log(2), and I want it to draw an output for from log(2) 2 to log(2) 100000

I found this site: http://www.numberempire.com/graphingcalculator.php, it draws what I want if I input log(x), but I need similar input but for fixed logarithm (in example log(2)).

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have you ever used this site? –  Santosh Linkha Sep 26 '13 at 14:02
3  
Might WolframAlpha be what you're looking for? Also, $\log_2 (x) = \frac{\ln(x)}{\ln(2)}$ is a nice cheat. –  Arthur Sep 26 '13 at 14:02
    
Yes, I was looking at wolfram, but I think it isn't drawing what I want because I don't know how to input my function correctly. If I input log(2), it gives me function where all the values are the same, so currently I am inputting values manyally, like log(2) 10, but it isn't drawing anything, this only gives me a flat number, like calculator does. –  ojek Sep 26 '13 at 14:04
    
@ojek Look at my link for how to do it. –  Arthur Sep 26 '13 at 14:06
    
@Arthur: Yeah, that helped, thanks! –  ojek Sep 26 '13 at 14:09

1 Answer 1

up vote 2 down vote accepted

Your notation is not the usual notation. A person will usually parse $\log(2)$ as either $\log_{10}(2)$ or $\ln(2)=\log_e(2)$ depending on context, which in both cases is just a real number. However, you want to plot a function and, from what I can gather, you want to plot the function $\log_2(x)$ for $2\leq x\leq 100000$. To input this in to a program or web interface, you'll either have to write log_2(x) or log(x)/log(2) (these are the same expression by the properties of logarithms).

In Wolfram Alpha, you get this or this which are the same output.

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