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From: <HBB<roeker@t...>  20071115 21:13:30

Spinora wrote: > ...something's broken either with my browser or with this website... FYI: "this" is not a website. It's a mailing list. We don't know which freeloading website you contact it by. See my reply to the newsgroup for the most likely problems with your fit command. 
From: Donald C Hayes <dchayes@us...>  20071115 15:17:20

I am using Gnuplot 4.2 on Windows. My understanding is that the yaxis should autoextend to the next major tic unless yfixmin and yfixmax are set. When I try to eliminate exponential labels on the yaxis by defining the labels (see commented ytics statements), I lose autoextention of the yrange to the next whole number of tics. I have tried defining the ymax and ymin range as a function (see commented yrange statement), but cannot figure out how to assign the ymax and ymin values. The ymax and ymin values need to be set automatically from the data. Any solution is appreciated. set terminal gif nocrop font 'verdana' 11 size 900,800 xFFFFFF x000000 x000000 \ x6699cc \ x87c6e0 \ xa0f3e6 \ x6b9046 \ xd5a74b \ xc17e37 \ xaa5522 \ x990033 \ xff0000 set output '02035000.gif' set title "02035000 JAMES RIVER AT CARTERSVILLE, VARegulated" font 'verdana, 13' set size .94, .9 set bmargin 5 set xdata time set x2data time set timefmt '%Y%m%d%H%M%S' set format x "%b" set format x2 "%Y" set xtics in scale 1, 1 offset 1.8 set x2tics offset graph 0.027,1.09, 0 set mxtics 2 set mx2tics 2 set xrange ["20060101" to "20071231"] set x2range ["20060101" to "20071231"] set xlabel ' Provisional Data Subject to Revision ' 0,2 font 'verdana, 11' tc rgb "#ff0000" set logscale y 10 #set ytics in (0.001, 0.01, 0.1, 1, 10, 100, 1000, 10000, 100000, 1000000) #set ytics in autofreq 0.001, 1e1, 100000 add ("1000000" 1000000) set ytics in #set yrange [(10**floor(log10(ymin))):(10**(ceil(log10(ymax)+1)))] writeback set yrange [*:*] set ylabel " Discharge in cubic feet per second " set grid xtics mxtics ytics back lw 0.25 linecolor rgbcolor "#000000" set key off plot '02035000_daily_plot.txt' using 1:10:11 w filledcurves lc 1,\ '02035000_daily_plot.txt' using 1:9:10 w filledcurves lc 2,\ '02035000_daily_plot.txt' using 1:8:9 w filledcurves lc 3,\ '02035000_daily_plot.txt' using 1:6:8 w filledcurves lc 4,\ '02035000_daily_plot.txt' using 1:5:6 w filledcurves lc 5,\ '02035000_daily_plot.txt' using 1:4:5 w filledcurves lc 6,\ '02035000_daily_plot.txt' using 1:3:4 w filledcurves lc 7,\ '02035000_daily_plot.txt' using 1:11 w lines lw 1 lc rgb "#000000",\ '02035000_daily_plot.txt' using 1:10 w lines lw 1 lc rgb "#000000",\ '02035000_daily_plot.txt' using 1:9 w lines lw 1 lc rgb "#000000",\ '02035000_daily_plot.txt' using 1:8 w lines lw 1 lc rgb "#000000",\ '02035000_daily_plot.txt' using 1:7 w lines lw 1 lc rgb "#000000",\ '02035000_daily_plot.txt' using 1:6 w lines lw 1 lc rgb "#000000",\ '02035000_daily_plot.txt' using 1:5 w lines lw 1 lc rgb "#000000",\ '02035000_daily_plot.txt' using 1:4 w lines lw 1 lc rgb "#000000",\ '02035000_daily_plot.txt' using 1:3 w lines lw 1 lc rgb "#000000",\ '02035000_daily_plot.txt' using 1:2 w lines lw 2 lc rgb "#990033",\ '02035000_daily_plot.txt' using 1:12 w lines lw 1 lc rgb "#000000",\ '02035000.DV.rdb' using 1:($2) w lines lw 2.5 lc rgb "#FF0000" ******************************* Don Hayes USGS 1730 East Parham Road Richmond, Va. 23228 (804) 2612632 ******************************* 
From: Thomas Sefzick <t.sefzick@fz...>  20071115 14:08:36

this fit can not work: the 1st derivatives of f(x,y) with respect to 'b' and 'c' are delta functions chisq only changes when the borders of your 'boxinterval' cross datapoints. e.g. with the starting values a=20; b=6; c=1.5 you get the fit result: a = 5.9 b = 6 c = 1.5 but you will get the same fit result for 'a' for 1.0 < c < 2.0 or 5.5 < b < 6.5 and 'b' and 'c' are not changed at all. (if the interval borders are on datapoints, the fit result is unpredictable) in principle you are calculating the mean of all datapoints inside the 'boxintervall'. you need a continuous function for fitting, e.g. a normal distribution: n(x)=c*exp((xa)**2/b)  View this message in context: http://www.nabble.com/3dfittingtf4810729.html#a13768274 Sent from the Gnuplot  User mailing list archive at Nabble.com. 
From: Richard Henwood <r.henwood@rl...>  20071115 13:42:48

Luiz Fernando C Camargo wrote: > > Hello Gnuplot users: > > I can produce high quality drawings using Gnuplot with > terminal set to 'postscript eps enhanced color'. Then I use > LaTeX package overpic to put mathematical symbols and text > (in the same mathematical and text fonts used in the body of > the main LaTeX document) wherever I want. Fine, but I wonder > if there isn't a more direct way to do this. Setting terminal > to 'latex' does the job but does not give me files of the same > quality. Can someone please tell me something about this? I > have googled for this already, but still not satisfied. > Thanks for any advice. > term epslatex is what I use. r, 
From: Luiz Fernando C Camargo <lfcamar@gm...>  20071115 13:16:47

Hello Gnuplot users: I can produce high quality drawings using Gnuplot with terminal set to 'postscript eps enhanced color'. Then I use LaTeX package overpic to put mathematical symbols and text (in the same mathematical and text fonts used in the body of the main LaTeX document) wherever I want. Fine, but I wonder if there isn't a more direct way to do this. Setting terminal to 'latex' does the job but does not give me files of the same quality. Can someone please tell me something about this? I have googled for this already, but still not satisfied. Thanks for any advice. Luiz Fernando C Camargo 
From: Spinora <N.M<olkenthin@gm...>  20071115 11:29:04

Thomas Sefzick wrote: > > could you make an example available? (data file, function) > > ...something's broken either with my browser or with this website... when i click a link it keeps just reloading the page i'm on... my favorite function was f(x,y)= a*(sgn(xb+c)sgn(xbc)) which is a stepfunction of the height a, width c and offset b. my data looks like this: 0 0 0 1 0 0 2 0 0 3 0 0 4 0 1 5 0 15 6 0 20 7 0 3 8 0 0 9 0 0 10 0 0 0 1 0 1 1 0 2 1 0 3 1 0 4 1 0 5 1 11 6 1 20 7 1 1 8 1 1 9 1 0 10 1 0 0 2 0 1 2 0 2 2 0 3 2 2 4 2 1 5 2 16 6 2 16 7 2 0 8 2 0 9 2 0 10 2 0 0 3 0 1 3 0 2 3 0 4 3 3 5 3 18 6 3 21 7 3 11 8 3 0 9 3 0 10 3 0 0 4 0 1 4 0 2 4 0 3 4 0 4 4 1 5 4 4 6 4 15 7 4 6 8 4 0 9 4 0 10 4 0 does that help? startingvalues I've tried were a=20, b=6, c=2  View this message in context: http://www.nabble.com/3dfittingtf4810729.html#a13765786 Sent from the Gnuplot  User mailing list archive at Nabble.com. 
From: Thomas Sefzick <t.sefzick@fz...>  20071115 11:18:35

could you make an example available? (data file, function)  View this message in context: http://www.nabble.com/3dfittingtf4810729.html#a13765780 Sent from the Gnuplot  User mailing list archive at Nabble.com. 
From: Spinora <N.M<olkenthin@gm...>  20071115 11:04:18

Thomas Sefzick wrote: > > the first question you have to answer is: > which function would describe your data best? > > then use this function and set the parameters by hand, so that the > function is already in the region where the datapoints are, and then start > the fit. > > if you start a fit with parameters set to values which cause the function > to be far off the datapoints, then this fit will not work. due to the > inadequate stepsize chosen automatically it may find some minimum but not > the real one (for comparison: with 1m steps you may explore the bumpiness > of a floor but will not find a hole which has a diameter of 1mm and is > 10.5m away). > I have tried several starting Values some quite close to what I thought by eye might be an okay value (although not brilliant). In that case it just did one Iteration and then told me that was best it could do, although I am sure it's not. The thing is I need a function as simple as possible so its a kind of stepfunction in x direction and constant in y direction the parameters are height, width and offset (although i have tried other functions). All I want to do with this is find out if there is a bump somewhere in my data which is straight in ydirection. So the fit is supposed to do really bad if thats not the case and give back lots of chisquare.  View this message in context: http://www.nabble.com/3dfittingtf4810729.html#a13765313 Sent from the Gnuplot  User mailing list archive at Nabble.com. 
From: Thomas Sefzick <t.sefzick@fz...>  20071115 10:30:34

Spinora wrote: > > I have data with 3 values: x,y and z and I would like to fit f(x,y) to it. > I read in the help that the usual fitfunction could do the job but when i > actually try it the fitted function in nowhere near my data. > > I've tried differnt functions and they all seemed to fail in different > ways: one kept quitting after 2 iterations, giving back the starting > values, one did about 15 Iterations and gave back something far from the > starting values but even further from the data, one kept giving back a > nearly flat plane (which is pretty wrong) but at least it seemed to be at > the average of the data. > From this variety of errors I was unable to find out what went wrong, hope > someone can help me here. > the first question you have to answer is: which function would describe your data best? then use this function and set the parameters by hand, so that the function is already in the region where the datapoints are, and then start the fit. if you start a fit with parameters set to values which cause the function to be far off the datapoints, then this fit will not work. due to the inadequate stepsize chosen automatically it may find some minimum but not the real one (for comparison: with 1m steps you may explore the bumpiness of a floor but will not find a hole which has a diameter of 1mm and is 10.5m away).  View this message in context: http://www.nabble.com/3dfittingtf4810729.html#a13765109 Sent from the Gnuplot  User mailing list archive at Nabble.com. 
From: Spinora <N.M<olkenthin@gm...>  20071115 09:30:36

Hi I have data with 3 values: x,y and z and I would like to fit f(x,y) to it. I read in the help that the usual fitfunction could do the job but when i actually try it the fitted function in nowhere near my data. I've tried differnt functions and they all seemed to fail in different ways: one kept quitting after 2 iterations, giving back the starting values, one did about 15 Iterations and gave back something far from the starting values but even further from the data, one kept giving back a nearly flat plane (which is pretty wrong) but at least it seemed to be at the average of the data. >From this variety of errors I was unable to find out what went wrong, hope someone can help me here. cheers Spinora  View this message in context: http://www.nabble.com/3dfittingtf4810729.html#a13764386 Sent from the Gnuplot  User mailing list archive at Nabble.com. 
From: <skip@po...>  20071115 03:40:31

>> Alas, that doesn't work either. I lose all x axis labels as well as >> the vertical part of the grid. HansBernhard> Then it's probably HansBernhard> set format x "" HansBernhard> you want. And, like you originally were about to do, you HansBernhard> want to do that only in the first 2 plots. The last plot HansBernhard> should return to the default HansBernhard> set format x "% g" Thanks, that gets me closer. Now the labels are gone. The vertical space allocated to the missing x axis labels is still allocated, but I think I can fudge that with some set size commands.  Skip Montanaro  skip@...  http://www.webfast.com/~skip/ 
From: <sonataturizm@gm...>  20071115 01:36:52

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From: <HBB<roeker@t...>  20071115 00:20:23

skip@... wrote: > Alas, that doesn't work either. I lose all x axis labels as well as the > vertical part of the grid. Then it's probably set format x "" you want. And, like you originally were about to do, you want to do that only in the first 2 plots. The last plot should return to the default set format x "% g" 
From: <skip@po...>  20071115 00:05:41

>> where each of the p?.gnu files defines a single plot. >> All three plots have the same x range. Reading the docs >> for the set xtics command I couldn't figure out how to >> have just the p3 plot display x axis labels. HansBernhard> Easy. By breaking this scheme: >> All the plot files have this overall form: >> [...] >> set xtics nomirror HansBernhard> This was the right general idea already: >> I tried >> >> set xtics "" HansBernhard> You want HansBernhard> unset xtics HansBernhard> instead. Alas, that doesn't work either. I lose all x axis labels as well as the vertical part of the grid. Here's what I get: http://www.webfast.com/~skip/plotnotics.png What I want is this: http://www.webfast.com/~skip/plottics.png but with the x axis labels on the top two plots removed. Thanks,  Skip Montanaro  skip@...  http://www.webfast.com/~skip/ 