Cursors in Igor Pro

Cursors A and B mark points on a trace, and a function can read or place them.

Function AnalyzeBetweenCursors()
    if (strlen(CsrInfo(A)) == 0 || strlen(CsrInfo(B)) == 0)
        Print "place both cursors first"
        return NaN
    endif

    WAVE w = CsrWaveRef(A)
    Variable first = min(pcsr(A), pcsr(B))
    Variable last = max(pcsr(A), pcsr(B))

    WaveStats/Q/R=[first, last] w
    Printf "%g to %g: mean %g\r", xcsr(A), xcsr(B), V_avg
    return V_avg
End

How it works

1. Cursor/P places one by point number; without it, by x value.
2. pcsr(A) reads the point, xcsr(A) the x value, CsrWave the trace.
3. That is how an analysis works on the region a user selected.

Keywords and builtins used here

• CsrInfo
• CsrWaveRef
• End
• Function
• NaN
• Print
• Printf
• Variable
• WAVE
• WaveStats
• endif
• if
• max
• min
• pcsr
• return
• strlen
• xcsr

The run, in numbers

Lines

14

Characters to type

341

Tokens

95

Three-star pace

85 tpm

At the three-star pace of 85 tokens a minute, this run takes about 67 seconds.

Type this snippet

Step 3 of 4 in Marking it up, step 14 of 19 in Graphs & presentation.

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