Custom Y-grids for multi-plot graphs

How do I get the Y-axis gridlines to change for a given Y-axis (I have three)? As it is now, I have different scales for each Y-axis and the gridlines for all of them are displayed at the same time. This makes the graph very messy and it is difficult to discern which plot goes with which gridline.

The way a multiplot graph is displaying scales is a bit curious.
It's true a graph displys all scales at the same time, so if the various Y scales are different the display is confusing as you said.
I suggest you some workarounds.
First of all, arrange all Y axis in order to have the same or multiple scale so that all grid lines are equally spaced.
Second, display the same lines for all Y scales (customizing the tabs as Alberto says).
Third, display grid lines for different Y axes with different colors (maybe choosing pastel colors for grid lines and the same but bright color for plots).
Fourth, hide all grid lines but one. It seems that this built-in option works in a curious way: if you have a black graph background you can see some pixels painted along X grid
lines where Y grid should lie, and if you have another color background you can see the complete but 'hided' grid lines, as if they were painted in black instead of transparent. So I suggest you to use for grid lines the same color as graph background : that way the Y axis grid lines are effectively hided.
Hope this helps
Roberto
Proud to use LW/CVI from 3.1 on.
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Speaking only for myself, I am not sure about the nature of your request.
Could you please post some code showing an example of what you can do now and a jpg of what you desire.
This may help us help you.
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Jeanius,
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MODDEDmixed graph cursor ex.vi ‏41 KB

Select plot by mouse in a multi-plot graph

Hello
I'm using LV 8.5 and have a question using a waveform graph. I have multiple plots (up to about 300) in this graph and most of them will have approximately the same waveform but some will have a totally different -> the user needs to identify these plots (get the name of it when moving the mouse over it for example).
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Hello and thanks for your answer!
Unfortunately this solution does not work, I add a picture to show the problem. If the user has to click through all plots (1500...) to get ther right one, he needs really a lot of time!
Message Edited by Osiris81 on 04-17-2008 09:45 AM
Attachments:
plotExample1.jpg ‏263 KB

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I'm going to go ahead and post my own answer to this one.
I'm not sure why this one was so difficult for me, especially since I was "almost" there. I suppose I need a little more experience working with arrays.
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Solved!
Go to Solution.
Attachments:
G2.jpg ‏258 KB

I think part of your problem is you are not aware of the "concatenate inputs" option for build array. You don't need multiple build arrays for the array of clusters you are wiring into the graph (pink wire). Just expand the build array, wire in all your clusters, then right click the build array and choose "concatenate inputs". Next, you can use a cluster to store all your graph arrays (orange wires) which will greatly clean up your diagram.
CLA, LabVIEW Versions 2010-2013

Custom tabular form for multi-row not saving data

Ok, before anyone asks, yes, I did read the how-to:-)
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It returns data rather nicely and when I go and update values I can tell it is changing the fields underneath. I put a process in that will display the values in text fields on the form (for one row only) and I see them changing from what is already there and with the proper values.
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Florian,
Checkboxes are different from other HTML form items. When you have a text box for example, there's always a value send to the server when submitting. Even if that value is NULL. When you have a checkbox however, you only get the value if the checkbox is checked. It's not posted to the server when it is not checked. That's the general behavior of HTML forms and not specific to Oracle HTML DB.
When working with tabular forms in HTML DB, you can access your form values using the htmldb_application.g_f0x arrays. Now if you have for example 10 rows in your form, then you'll get ten elements in your array for text boxes, select lists, etc. For checkboxes however you'll only get as many elements as you have rows checked. If I read your update and insert code correctly, you're trying to use the checkbox arrays the same way you use the arrays based on other item types. My recommendation would be to use Yes/No select lists instead of checkboxes or at least use select lists initially to get it working and then work on properly processing the checkboxes.
Some general information about working with checkboxes in tabuar forms can be found here:
http://www.oracle.com/technology/products/database/htmldb/howtos/checkbox.html#CHECKBOX_IN_REPORT
Hope this helps,
Marc

Multi-plot graphs

Hello,
I would like to draw a graph that has four different plots (same x-axis), in addition I want to see all the prvious points of measurement.
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C:\Program Files\National Instruments\LabVIEW 7.0\examples\general\graphs\gengraph.llb\Waveform Graph.vi
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Multi plot graph

what is the best way to combine the 4 graphs that i have onto one?
Attachments:
qstn.JPG ‏36 KB

Hi retroscie...,
use the build array function to combine them to one graph.
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Mike
Message Edited by MikeS81 on 09-09-2008 01:48 PM
Attachments:
xy.PNG ‏6 KB

Multi plot cursor in Mixed Graph

If Digital waveform and normal waveform graph is plotted in a mixed graph, and if I choose watch all plots(multi plot) in cursor, LabVIEW closes immediately with an error popup dialog
I have attached the print screen image of that error popup
Attachments:
error.JPG ‏188 KB

Hi Stephen,
           I found a considerable solution to overcome that error.
           Build all the array data at first and then generate digtal
waveform in single instance.
           ie., With number of numerical array data, build a 2D array of
numerical data and make a transpose and then generate a waveform.
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column size of 2D Array.
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while using multi plot cursor--> watch--> All plots.
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your reference.
Regards,
Raja
Project Engineer
Soliton Technologies
www.solitontech.com
Attachments:
Mixed Graph Modified without Error.vi ‏25 KB

Multi-plot cursor in xy graph

I am using an XY graph with 5 curves which belong to one of two y axes each. All curves share the same array of x values. I do not like the cursor legend so I want to read out the values of the one cursor programmatically. I can create a multi-plot cursor which watches all the 5 curves but I cannot find how I can read out the 5 corresponding y values of my cursor. Any help?
Thanks,
LX (using LV2014)

Use the cursor index property value and wire that to an index array function for each y array.

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If I plot both Analog Waveform and Digital Waveform in a single Mixed Graph, and when I choose watch all plots in cursor legend, LabVIEW crashes with an error message.....
I have also attached  the Print screen image of that Error
Attachments:
error.JPG ‏188 KB

Jared Boothe,
           I found a solution to overcome that error.
           Build all the array data at first and then generate digtal waveform in single instance.
           ie., With number of numerical array data, build a 2D array of numerical data and make a transpose and then generate a waveform.
           It generates number of digital waveform equal to that of the column size of 2D Array.
           Do not build generated digital waveforms. This creates an error while using multi plot cursor--> watch--> All plots.
           I have attached the modified, error free Vi with this message for your reference.
Regards,
Raja
Project Engineer
Soliton Technologies
www.solitontech.com
Attachments:
Mixed Graph Modified without Error.vi ‏25 KB

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Stefano Moret wrote:
When you write about use property nodes, I'm using the "visible" one.
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In the attached VI, XScale.Multipler = 0.1, and Cursor 1 (Single-Plot) shows the correct value, but Cursor 2 (Multi-plot) does not.
Attachments:
MixedSignalCursor.vi ‏14 KB

Hello,
The behavior I see is that the multi-plot cursor which is snapped to plot 0 seems to generally follow an "imaginary plot" which corresponds to a scaled version of plot 0, where the scale factor is the value wired to the XScale.Multiplier property. I don't think this is desired behavior so I have filed a corrective action request to R&D to have this addressed. I am sorry for the inconvenience - hopefully you can live with an X-scale multiplier of 1, or the single plot cursors for the time being. It also takes the offset property similarly, offsetting the "imaginary plot" by whatever value is set there.
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Thank you,
Best Regards,
JLS
Best,
JLS
Sixclear

Custom Y-grids for multi-plot graphs

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