You can use the data reader tool to read the (X,Y) coordinate values. Open the Script Window (Window:Script Window) and type the following: x= and press Return. The x value will be typed out to the Script Window. Repeat for y (y=).
Move the cursor to a new X,Y value and again return the values to the Script Window.
You can then use the Script Window for simple math.
You can also use the data selector tool to set both left and right point on your graph before you read out the difference.
Place a text label on your graph, Press the (Alt) key while you double click on the label, Change "script run after" to Button up and paste the following code into the script part of the window,
ii=0; dotool 4; define PointProc { // Insert all commands to perform after dotool here ii++; ii1=MKS1; ii2=MKS2; Type Marker position:; ii1=; ii2=; Type DeltaX: ; Data1_A[ii2]-Data1_A[ii1]=; Type DeltaY: ; Data1_B[ii2]-Data1_B[ii1]=; DeltaX=Data1_A[ii2]-Data1_A[ii1]; DeltaY=Data1_B[ii2]-Data1_B[ii1]; if (ii>0) dotool 0; }
The PointProc is a little more difficult than ordinary Labtalk code. To get it working the first time I searched the forum for 'PointProc'.
After you press the button you can move the markers with the mouse or the keyboard and when you doubleclick the data are shown in the script window. You can add more code to perform some more calculation using the values of DeltaX and DeltaY.
Measuring distances on a line graph
Posted - 03/22/2002 : 10:47:53 AM
