Right-click on the X-axis, select Format Axis, choose the "Scale" tab, and
tick the "logarithmic scale" box.

You will, of course, need to be using the XY chart (confusingly named
scatter), rather than a line chart.
--
David Biddulph

"Pratap D. chavan" <Pratap D. wrote in
message ...
How to draw chart: log scale on X axis, natural scale on y axis? sample
data
is given below. This chart is used for Civil Engineering?

X axis Y axis
Sieve size % passing
26 mm 100
22 mm 95
16 mm 81
12 mm 75
10 mm 66
4.8 mm 52
2.4 mm 42
1.2 mm 32
0.6 mm 18
0.3 mm 16
0.15 mm 9
0.09 mm 3