Thread: log scaled values

Hi,

I have a chart with a point that looks to be about halfway between 40 and 50, however that axis is log scaled. I'm guessing that it would be about 43.

I want to draw a line that represents 45 on that axis, how should I do that?

Cheers,

T

Originally Posted by tolland

Hi,

I have a chart with a point that looks to be about halfway between 40 and 50, however that axis is log scaled. I'm guessing that it would be about 43.

I want to draw a line that represents 45 on that axis, how should I do that?

Cheers,

T

log 50= 1.699 and log 40= 1.602, a difference of 0.097. log 45= 1.653 which is .051 larger than log 40 so 45 would be 0.051/0.097= 0.525 or about 53% of the way betwen 40 and 50.

Oh, and half way between log 40 and log 50 is 1.6485= log 44.5.