graph autosacling

[paulneal]

i have written some script that autoselects traces based on a bit array. However i am trying to autscale with some problems.

The "trace1[a]" parameter does not work in the max function. If i just type in ambient then everything is fine.

I am assuming i have to remove the "" marks but am not sure. Cheers in advance Paul.

global trace_sel
global graph_max
global graph_min
private string trace1
private string trace2
private A

global string B

trace1[1] = "AMBIENT"
trace1[2] = "SHOPFLOOR"
trace1[3] = "DX_1"
trace1[4] = "DX_2"
trace1[5] = "WAT_IN"
trace1[6] = "WAT_OUT"
trace1[7] = "STORES"
trace1[8] = "PROBE_6"

trace2[1] = "AMBIENT"
trace2[2] = "SHOPFLOOR"
trace2[3] = "DIXELL 1"
trace2[4] = "DIXELL 2"
trace2[5] = "WAT_IN"
trace2[6] = "WAT_OUT"
trace2[7] = "STORES"
trace2[8] = "PROBE_6"


if (trace_sel[0]>0)
A = trace_sel[0]
Component.pplots1.DeleteTrace("LINE_1")   
Component.pplots1.AddTrace("LINE_1")
Component.pplots1.LINE_1.color=1058796
Component.pplots1.LINE_1.strYExpression=TRACE1[a]
Component.pplots1.LINE_1.strLabel=trace2[a]
Component.pplots1.LINE_1.LineType = 5
B=trace1[a]
graph_max=max(b[0,50])
else
Component.pplots1.DeleteTrace("LINE_1")
endif

if (trace_sel[1]>0)
 A = trace_sel[1]  
Component.pplots1.DeleteTrace("LINE_2")
Component.pplots1.AddTrace("LINE_2")
Component.pplots1.LINE_2.color=16588818
Component.pplots1.LINE_2.strYExpression=TRACE1[a]
Component.pplots1.LINE_2.strLabel=trace2[a]
Component.pplots1.LINE_2.LineType = 5
else
Component.pplots1.DeleteTrace("LINE_2")
endif

[AzeoTech]

you need to use the execute() statement or evaluate() function when you want to do a macro expansion like this (a macro expansion is when you have part or all of the expression contained in a string. Not a DF term, but a general application term).

So:

graph_max = evaluate("max(" + trace1[a] + "[0,50])")