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Questions on graphs and charts.,,,
GNS
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12-22-2003 01:09 AM
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Hi ,
I have always been facing problem while working with graphs and charts. First of all let me be clear with the data these accept. further questions as under:
1. If I wire an array (1-dimention) to graph/chart , it plots it on Y axis. In this case, what are the values on x.axis?
2. If I want to acquire a voltage on Analog I/P channel for some specified time , say 2 sec., how to ensure that time span and data without missing anyone.
3. If I have to plot an I-V plot, how to make sure that V will come on Y-axis and I will come on X-axis.
Plz clear these doubts...
Regards
GNS
I have always been facing problem while working with graphs and charts. First of all let me be clear with the data these accept. further questions as under:
1. If I wire an array (1-dimention) to graph/chart , it plots it on Y axis. In this case, what are the values on x.axis?
2. If I want to acquire a voltage on Analog I/P channel for some specified time , say 2 sec., how to ensure that time span and data without missing anyone.
3. If I have to plot an I-V plot, how to make sure that V will come on Y-axis and I will come on X-axis.
Plz clear these doubts...
Regards
GNS
LucaP.
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12-22-2003 01:43 AM
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Hi,
1. The graph interprets the data as points ont the graph and increments the x index by one starting at x=0. If you want a different starting point or increment, then use the bundle function. Check the graph examples in the "LV examples".
2. In this case you've to use a continous data acquisition (HW timed). If you're using a NI board, then check the countinous I/O examples in the "LV examples".
3. Use a XY-Graph which you'll find in the same palette as the chart and graph. The XY-Graph accepts a cluster which contains an x array and a y array.
Hope this helps.
Luca
1. The graph interprets the data as points ont the graph and increments the x index by one starting at x=0. If you want a different starting point or increment, then use the bundle function. Check the graph examples in the "LV examples".
2. In this case you've to use a continous data acquisition (HW timed). If you're using a NI board, then check the countinous I/O examples in the "LV examples".
3. Use a XY-Graph which you'll find in the same palette as the chart and graph. The XY-Graph accepts a cluster which contains an x array and a y array.
Hope this helps.
Luca
Regards,
Luca
Luca
Nirmal_Sharma
Member
12-22-2003 03:40 AM
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Hi,
1. Charts takes sigle point value like plotting DC voltages, Graph takes set of values like arrays (1D) which are plotted on Y-axis with respect to x axis which is integer number like 0,1,2..etc.. ,
XY graph takes bundled array of X-axis & Y axis.
2. Charts are used where a single point value is to be presented/updated w.r.t. to time or x scale (x scale can also act an index).
Also it supports update modes like sweep, scope & strip.
3. Graph are used to plot waveforms which does have no. of samples acquired from DAQ board or other source, which needs to be plot on Y-axis.
Main inputs of waveforms are starting time (t0), time stpes(dt) & Y elements.
4.X-Y graphs are used where you want to plot Y elements w.r.t. to the defined X eleme
nts. For e.g. I want to plot as
Y=10 when X = 0
Y=20 when X = 2
Y=30 when X = 3
etc.
Here we have one array of Y elements & other array of X elements. So bundle your X & Y array & fetch to XY graph to plot it.
Hope it clears you the concepts. Your feedbacks are welcome.
Best Regards,
Nirmal Sharma
India
1. Charts takes sigle point value like plotting DC voltages, Graph takes set of values like arrays (1D) which are plotted on Y-axis with respect to x axis which is integer number like 0,1,2..etc.. ,
XY graph takes bundled array of X-axis & Y axis.
2. Charts are used where a single point value is to be presented/updated w.r.t. to time or x scale (x scale can also act an index).
Also it supports update modes like sweep, scope & strip.
3. Graph are used to plot waveforms which does have no. of samples acquired from DAQ board or other source, which needs to be plot on Y-axis.
Main inputs of waveforms are starting time (t0), time stpes(dt) & Y elements.
4.X-Y graphs are used where you want to plot Y elements w.r.t. to the defined X eleme
nts. For e.g. I want to plot as
Y=10 when X = 0
Y=20 when X = 2
Y=30 when X = 3
etc.
Here we have one array of Y elements & other array of X elements. So bundle your X & Y array & fetch to XY graph to plot it.
Hope it clears you the concepts. Your feedbacks are welcome.
Best Regards,
Nirmal Sharma
India
