How to place markers on the plot ?

[LVCoder]

Dear All,

I have a graph where i am plotting 4 channel data.

I want to put markers on each channel.

By Markers, i mean small dots on the plot which gives me the x-difference between the two. And, one more thing, the markers should only move on the plot and not elsewhere.

I know something can be done with the cursors in the graph pallete. but, they take a lot of place in the graph. 1 horizontal and 1 vertical line for each plot would add to alot more confusio.

I am putting a picture to make things more clear of what i want. Black line represents the data and on it i have placed 2 red markers.

Juat have a look at the pic and let me know if that thing is possible in LabView??

Thanks

[Dennis_Knutson]

Yes, it is possible and you would use cursors. You can customize the appearance of a cursor and the vertical/horizontal lines are optional. Make the Cursor Legend visible and create a cursor. Right click on it and select Attributes. You will be able to see the different options. All of these are also settable with a property node.

[smercurio_fc]

Definitely try thte cursors first, as Dennis suggests. If that doesn't work for you, you can always use annotations. Check the LabVIEW Help and the shipping examples.

[LVCoder]

Hi,

Thanks alot for the sloution.

Yes, with the Attributes i just got what i was looking for.

but somehow i couldn't get how to play around with them via property node.

I have placed 2 cursors on the plot. i want to display the x-difference between the 2 cursors. With the property node, i was just able to manipulate the 1st Cursor, and not the second. Any idea how can i play around with the 2nd Cursor.

And also i want an indicator just above the 2nd Cursor which shows the x-difference between the 2 Cursors. How is this possible?

Thanks

[devchander]

Use the active cursor property as shown in attached VI

Read each cursor's x co-ordinate using 'cursor.PosX' property node and find their difference

Regards,

Dev

Message Edited by devchander on 09-10-2008 06:33 AM

[LVCoder]

Thanks alot.

I got the way.

Is there anyway i can place an indicator just on top of the 2nd cursor(and moves along with it) which displays the x-difference b/ween the 2 cursors ?

I can place an indicator on top of the cursor but its position remains static. I want the indicator to move with the cursor.

[devchander]

Simpler Method>> just keep renaming the 2nd cursor with the x difference

Look at at attached VI

Ofcourse you could do further string concatenations/ modifications to customize what you want to display

Message Edited by devchander on 09-10-2008 07:21 AM

[LVCoder]

Lollsss...

Your simpler method is just too simple that my mind aint allowing me to implement it. 

i was looking for some tedious methods to do d same. 

you have put my mind on HALT now. 

Thanks

[devchander]

ritesh024: "you have put my mind on HALT now.   "

Is that good news or bad news?????

regards,

Dev

[LVCoder]

It is bad until i found a new problem .

Ritesh