Re: [Gnuplot-info] Design of Experiment Data Plotting

[Thomas S. <t.s...@fz...>]

you are using 'dgrid3d' for mapping the data to a grid
(but you already have your data in grid format).
if you really want this functionality then you should
adjust the number of rows and columns to the data:

set dgrid3d 3 3


chuckh wrote:
> 
> Hi there,
> 
> I'm hoping someone can help me as I've read so much information and
> haven't found out what I am doing wrong.
> 
> Basically I am using a welding technology to develop a process for a
> medical customer. The welding process uses two main input parameters
> (Force and time). The customer is looking for a strong and aesthetically
> pleasing product. The higher the time and force the stronger the result is
> but the worse the aesthetic quality becomes. I'm looking to 3d plot the
> two input parameters and the result of the strength test (pull force
> value) and aesthetic quality (subjective 0-10 rating).
> 
> Example script looks something like the following using gnuplot 4.4 patch
> 3:
> 
> #Force vs. Time vs. Strength
> set xlabel "Force"
> set ylabel "Time"
> set zlabel "Strength"
> set pm3d
> set dgrid3d
> set contour
> set grid
> splot 'XXXXX.dat' with lines
> 
> # XXXXX.dat file looks like the following:
> #left: force   middle: time   right: strength
> 50	0.01	100
> 50	0.01	102.12
> 50	0.01	98.55
> 50	0.011	109.43
> 50	0.011	111.21
> 50	0.011	113.12
> 50	0.012	121.9
> 50	0.012	119.14
> 50	0.012	120.19
> 		
> 46	0.01	98.11
> 46	0.01	96.59
> 46	0.01	95.12
> 46	0.011	104.11
> 46	0.011	103.98
> 46	0.011	105.21
> 46	0.012	115.78
> 46	0.012	113.21
> 46	0.012	117.21
> 		
> 48	0.01	99.12
> 48	0.01	98.99
> 48	0.01	100.1
> 48	0.011	108.11
> 48	0.011	107.66
> 48	0.011	109.11
> 48	0.012	118.11
> 48	0.012	119.21
> 48	0.012	120.09
> 
> The problem I'm seeing is that the graph looks like this:
>  http://old.nabble.com/file/p31291642/example.png 
> 
> You see how the corners look like "horns". I would expect or should say
> want to have the graph roll more like a ramp. i.e. ramp up towards a
> higher time value and ramp down towards a lower time value.
> 
> Can anyone point out some tips on how to resolve this? Thanks
> 

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