Some variables show a logarithmic relationship. Thus, a log-linear graph gives a straight line. That is the main reason I have used "semi-log" paper, not to span a greater range of values.The main reason for using a logarithmic (or log) scale is that it can more easily accommodate data of several orders of magnitude.
IOW, 1 is usually where 0 would be on an ordinary scale ...
Mark
I think we're saying the same thing, but maybe I wasn't as clear as I should have been. When I wrote my response to the OP I was visualizing a slide rule scale (A, B, C, D scale), where the left-most number is 1. And this value corresponds to 0 on an ordinary scale.I have always thought of that the other way around. Zero on a linear scale cannot be plotted on a log scale, as log(0) is undefined. Log(1) = 0 It is that fact that seems to lead to the most confusion for students with whom I have worked. The reason is that so much empirical data is collected with a "zero" point and the students want to include the zero.
I have 3 or 4 of them around the house. One of them is an aluminum (aluminium for the Brits) Pickett I bought when I was an EE student (and not a very good one, I might add--but I was able to run the table playing pool!)Hey, anyone who knows what a slide rule is, much less how to use it, has my vote. I still have my old K&E mahogany. I thought we were saying the same thing, I just wasn't sure. John
The better term is "linear scale". Just FYI.On a uniform scale (for lack of a better term) the distance between two successive integer values is the same anywhere on the scale.
Thomas,there is given a open-loop large signal differential voltage amplification vs frequency table
i want to know what is the -3db cut off
maybe i would be clear if somebody could give me the values of the x scale from 1 to 100
i hope this isn't asked to much
thanks Thomas
Isn't that what a logarithm is? You plot (usually) log(Y) vs. X. You can do that on normal linear graph paper by converting your Y values to logs first, or you can use semi-log graph paper and just plot the values of Y. JohnI don´t understand why logarithmic scale is called logarithmic, when it actually is exponential scale.