[Gnuplot-info] The first line data is hidden?

[邹穗涛 <zou...@bi...>]

Hello：
My name is Suitao Zou, I'm from China. I hope I can get the solution of this
problem:
when I was graphing, I use the setting :

set terminal png transparent nocrop enhanced size 800,600
set output 'pos_sample.png'
set bar 1.000000
set boxwidth 0.9 absolute
set style fill  solid 10.0 border -2
set style rectangle back fc lt -3 fillstyle  solid 1.00 border -1
set key inside right top vertical Right noreverse enhanced autotitles
columnhead nobox
set style histogram clustered gap 50 title  offset character 0, 0, 0
set datafile missing '-'
set style data histograms
set xtics border in scale 1,0.5 nomirror rotate by -45  offset character 0,
0, 0
set xtics norangelimit
set title "pos-sample"
set yrange [0:1] noreverse nowriteback
set cblabel  offset character 0, 0, 0 font "" textcolor lt -1 rotate by 90
set locale "C"
plot 'data.dat' using 2:xtic(1) ti col title 'sample1', '' u 3 ti col title
'sample2'


The data is :
2    0.8    0.7
100    0.7    0.7
181    0.9    0.8
190    1    1
205    0.8    0.9
300    0.6    0.8
500    0.5    0.8

But I could not see the graph of the data of the first line.
I want to know how to set the value.
Thanks anybody who helps me!



Sincerely!

Suitao Zou