semilog graphing and excel
 

I am trying to make a semi-log graph with very small numbers for the x -axis

x=.01
x=.030303
x=.05

my y values are in the range from .2 to 1.1

excel makes the semilog graph for these values extremely small and will not
allow me to make my minor grid marks small enough to be appropriate for the x
axis values.

I also get many warning saying i cant use a number less than zero..

Any suggestions

Does the log trendline function of Excel work with these small numbers?

if i converted my data by multiplying by 1000 on all data points would the
out put still be similar...
--
dr chuck

semilog graphing and excel
 

I make a perfectly acceptable chart form
x y
0.01 0.2
0.03 0.7
0.05 1.1

with x-axis logarithmic. What was your problem?
I added a trend line.
Since the definition of log excludes any reference to negative values, you
cannot fault Excel for not being able to handle log(x) with x < 0.
best wishes
--
Bernard V Liengme
www.stfx.ca/people/bliengme
remove caps from email

"dr chuck" wrote in message
...
I am trying to make a semi-log graph with very small numbers for the
x -axis

x=.01
x=.030303
x=.05

my y values are in the range from .2 to 1.1

excel makes the semilog graph for these values extremely small and will
not
allow me to make my minor grid marks small enough to be appropriate for
the x
axis values.

I also get many warning saying i cant use a number less than zero..

Any suggestions

Does the log trendline function of Excel work with these small numbers?

if i converted my data by multiplying by 1000 on all data points would the
out put still be similar...
--
dr chuck