## How to use semi-log cycle graph paper ?

**Moderators:** honeev, Leonid, amiradm, BioTeam

### How to use semi-log cycle graph paper ?

If on the y-axis they have 1,2,3, etc..and then it goes 1,2,3 etc up to 10 again.

If I have data that I need to plot on the y-axis are 0.160, 0.255 ,etc

Do I change the 1,2,3 into 0.1,0.2? or do I just leave it?

Also, do I need to label the axis as being in semi-log?

Thank you.

If I have data that I need to plot on the y-axis are 0.160, 0.255 ,etc

Do I change the 1,2,3 into 0.1,0.2? or do I just leave it?

Also, do I need to label the axis as being in semi-log?

Thank you.

### Re: How to use semi-log cycle graph paper ?

On the graph paper, it has printed on it 1, 2, 3,4,5,6,7,8,9, and then 1,2,3,4,5,6,7,8,9,1 again going up the y-axis.

But my data is absorbance readings of 0.255, 0.331, etc . So I'm wondering, do I have to change those numbers to 0.1, 0.2 on the y-axis or just leave it since it is a semi-log graph.

I just realised I posted a new topic with the same question-------

Q. if my data is 0.1 do I mark it on the '1' for y-axis or am I mean to find out 0.1 = log Z and mark the Z number on the y-axis?

Thank YOu.

But my data is absorbance readings of 0.255, 0.331, etc . So I'm wondering, do I have to change those numbers to 0.1, 0.2 on the y-axis or just leave it since it is a semi-log graph.

I just realised I posted a new topic with the same question-------

Q. if my data is 0.1 do I mark it on the '1' for y-axis or am I mean to find out 0.1 = log Z and mark the Z number on the y-axis?

Thank YOu.

time would be on the x (linear) axis and OD expressed as power of 10 on the y-axis

so you would have to put 2.55x10^-1, 3.331x10^-1 and since each module (from 1 to 9.99) represent 1 power of 10 (your choice) you can just say that the first module of the y-axis is the 10^-1 module and go with that.

so you would have to put 2.55x10^-1, 3.331x10^-1 and since each module (from 1 to 9.99) represent 1 power of 10 (your choice) you can just say that the first module of the y-axis is the 10^-1 module and go with that.

Patrick

Science has proof without any certainty. Creationists have certainty without

any proof. (Ashley Montague)

Science has proof without any certainty. Creationists have certainty without

any proof. (Ashley Montague)

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