Included is an example of a data point graphing application setup.
Code: Select all
Procedure.d RoundNumber(arg_Number.d, arg_Decimals = 0)
Protected arg_Power
arg_Power = Pow(10, Abs(arg_Decimals))
If arg_Decimals > 0
arg_Number = arg_Number * arg_Power
ElseIf arg_Decimals < 0
arg_Number = arg_Number / arg_Power
EndIf
arg_Number = IntQ(arg_Number)
If arg_Decimals > 0
arg_Number = arg_Number / arg_Power
ElseIf arg_Decimals < 0
arg_Number = arg_Number * arg_Power
EndIf
ProcedureReturn arg_Number
EndProcedure
;=== Example 1
number.d = 562621.3728222
For a = -5 To 5
Debug Str(a) + " : " + StrD(RoundNumber(number, a), 7)
Next
Debug ""
;=== Example 2
;=== Finding canvas scale for plotting data points.
Global datapoints_x_min.f, datapoints_x_max.f, datapoints_y_min.f, datapoints_y_max.f
Global canvas_x_min.f, canvas_x_max.f, canvas_y_min.f, canvas_y_max.f
Global canvas_width, canvas_height
;===
; find_lowest_and_highest_xy_datapoints
;===
datapoints_x_min = -167.726
datapoints_x_max = 242.13
datapoints_y_min = -55.78
datapoints_y_max = 155.78
; Round to the nearest 100.
canvas_x_min = RoundNumber(datapoints_x_min - 100, -2)
canvas_x_max = RoundNumber(datapoints_x_max + 100, -2)
canvas_y_min = RoundNumber(datapoints_y_min - 100, -2)
canvas_y_max = RoundNumber(datapoints_y_max + 100, -2)
canvas_width = canvas_x_max - canvas_x_min
canvas_height = canvas_y_max - canvas_y_min
Debug StrF(datapoints_x_min, 3) + " - " + StrF(datapoints_x_max, 3) + " : " + StrF(datapoints_y_min, 3) + " - " + StrF(datapoints_y_max, 3)
Debug StrF(canvas_x_min, 3) + " - " + StrF(canvas_x_max, 3) + " : " + StrF(canvas_y_min, 3) + " - " + StrF(canvas_y_max, 3)
Debug Str(canvas_width) + " x " + Str(canvas_height)
