Re: [Gnuplot-info] Help with xyerrorbars

[Noora <cam...@gm...>]

Dear Thomas, 

this is what my datafile "pH1.txt" looks like

#V	A	Photocurrent(mA/cm2)	I short circuit	V open current 	Uncertainty
current
#Uncertainty vol
0.046	4.74	0.0901	0.45	0	0.01	0.01
0.086	4.74	0.0762	0	0.225	0.05	0.001
0.129	4.74	0.0586			0.002	0.001
0.146	4.74	0.0511			0.05	0.001
0.157	4.74	0.0458			0.05	0.001
0.167	4.74	0.0409			0.002	0.01
0.176	4.74	0.0359			0.002	0.001
0.184	4.74	0.0316			0.002	0.001
0.188	4.74	0.0293			0.002	0.001
0.193	4.74	0.0264			0.002	0.001
0.195	4.74	0.0243			0.01	0.001
0.199	4.74	0.0215			0.002	0.001
0.203	4.74	0.0190			0.002	0.01
0.204	4.74	0.0177			0.002	0.001
0.206	4.74	0.0169			0.002	0.001
0.206	4.74	0.0162			0.002	0.001
0.208	4.74	0.0154			0.002	0.001
0.209	4.74	0.0143			0.002	0.001
0.210	4.74	0.0133			0.002	0.001
0.211	4.74	0.0127			0.002	0.001
0.212	4.74	0.0120			0.002	0.001
0.212	4.74	0.0114			0.002	0.001
0.212	4.74	0.0110			0.05	0.001
0.212	4.74	0.0105			0.002	0.001
0.214	4.74	0.0095			0.002	0.001
0.215	4.74	0.0095			0.05	0.01


The uncertainty columns are the sixth and seventh column. 
I would be very grateful if you could give me a hint. It's for a chemistry
project and I really would like to make my graphs with gnuplot. 
Thank you! 



Thomas Sefzick wrote:
> 
> what does your data files look like?
> 
> seems that there are no valid errorbar values starting from line '3'
> 
> 
> Noora wrote:
>> 
>> Dear all, 
>> 
>> I am trying to plot a set of data from an experiment with xy errorbars.
>> However, whenever I try to do this and export the file to jpeg or png, I
>> can see the vertical and horizontal error bars on the first two data
>> points only(see image). I have tried making the values larger and smaller
>> to make sure that it's not just the scale that's making them impossible
>> to see. 
>> 
>> I used the load command in gnuplot to load the following .txt file 
>> 
>> set terminal jpeg
>> set output "graph.jpeg"
>> set bars 0
>> set points 1
>> set multiplot title "The Current-Voltage Characteristics of the DSSCs"
>> layout 2,1 
>> set grid
>> set title "pH 1.0"
>> plot "pH1.txt" using 1:3 w linespoints, "pH1.txt" using 1:3:7:6 w
>> xyerrorbars
>> unset title 
>> set title "pH 3.0"
>> plot "pH3.txt" using 1:3 w linespoints, "pH3.txt" using 1:3:7:6 w
>> xyerrorbars
>> unset title
>> unset multiplot
>> 
>> 
>> columns 7 and 6 include the delta x and delta y for my values for x and
>> y. 
>> 
>> (I am using Windows Vista.) 
>> 
>> If anyone can offer any help at all I would be extremely grateful. 
>> 
>> Thank you!  http://www.nabble.com/file/p26051683/graph.jpeg 
>> http://www.nabble.com/file/p26051683/graph.jpeg 
>> 
> 
> 

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