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 | | From: | Raghunathan | | Subject: | Plot the Hi-Lo limits and changing colors in same XY graph. | | Date: | Sun, 23 Jan 2005 10:40:48 -0600 (CST) |
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 | I have a requirement to plot two analog parameters - flow Vs rpm of a pump.=
The conditions are :
1. First plot the limits ( high and low ) of t=
he flow for an rpm range of 500 to 4100 based on a specification table in y=
ellow colour. For this I am trying to create a custom XY-Graph with BG prop=
erty set to "T" and superimpose on the real time graph. But the graph just =
does not become transperent - how to do this ?
2. In real time, ON T=
HE ABOVE SAME GRAPH, plot the acquired values in green colour for 500 to 41=
00 rpm and in blue colour for 4100 to 500 rpm. But unfortunatley when I tri=
ed to change color, just when I am reversing, the already plotted ascending=
curve also changes to blue colour !
I am making use of the XY-Chart=
buffer to simulate the real time plotting and make it behave like a wavefo=
rm chart.
After two days of trying to do the above, I have now start=
ed believing that the above is impossible in LV7.0 - I am sure it must be p=
ossible - but how ?
Thanks
Raghunathan
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| | From: | chilly charly | | Subject: | Re: Plot the Hi-Lo limits and changing colors in same XY graph. | | Date: | Sun, 23 Jan 2005 12:10:07 -0600 (CST) |
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Raghunathan wrote:
I have a requirement to plot two anal=
og parameters - flow Vs rpm of a pump. The conditions are :
1. First plo=
t the limits ( high and low ) of the flow for an rpm range of 500 to 4100 b=
ased on a specification table in yellow colour. For this I am trying to cre=
ate a custom XY-Graph with BG property set to "T" and superimpose on the re=
al time graph. But the graph just does not become transperent - how to do t=
his ?
2. In real time, ON THE ABOVE SAME GRAPH, plot the acquired values=
in green colour for 500 to 4100 rpm and in blue colour for 4100 to 500 rpm=
But unfortunatley when I tried to change color, just when I am reversing,=
the already plotted ascending curve also changes to blue colour !
<=
/blockquote>
1/ Use the paint brush in the tool palette, to paint in=
transparent color both the graph pane and the graph frame. You'll also hav=
e to hide the legend, the scales and the grid. However, you do not need to =
have two graphs : see point 2 !
2/ you can't have different colors f=
orm the same plot. Use different plots on the same graph, and add points on=
one or the other according to the conditions. You can use the "NaN" value =
(Not-A-Number) when you want to avoid plotting a point. See the attached vi=
CC
MultiColoredPlot.zip:
http://forums.ni.com/attachments/ni/170/103502/1/MultiColoredPlot.zip
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