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--- lua_scripting_tips [2025/03/09 09:10]
stanzurek [Complex numbers]
+++ lua_scripting_tips [2025/03/09 10:59] (current)
stanzurek [Rounding in LUA]
@@ Line 105: / Line 105: @@
 ===== Complex numbers =====
 Lua in FEMM handles complex numbers automatically, for example:
-<code>
+<code lua>
 a = 1 + I*2
 b = 0.3 - I*0.4
@@ Line 119: / Line 119: @@
 Full command executed with just the legend parameter set to -1 shows default limits for the legend. This seems to work in pure LUA, and mo_showdensityplot(-1) does not work even in pure LUA:
-  mo_showdensityplot(legend,gscale,upper_B,lower_B,type)
+<code lua>
-  mo_showdensityplot(-1,0,0,1,"bmag")
+mo_showdensityplot(legend,gscale,upper_B,lower_B,type)
+mo_showdensityplot(-1,0,0,1,"bmag")
+</code>
+legend: Set to 0 to hide the plot legend or 1 to show the plot legend.
 (note that: ''mo_showdensityplot(-1)'' will not work).
+===== Rounding in LUA =====
+Rounding does not appear to be immediately available in LUA 4.0. Teh
+<code lua>
+function round_LUA(var_input, round_precision)
+var_floor = floor(var_input/round_precision)*round_precision
+var_ceil = ceil(var_input/round_precision)*round_precision
+var_rounded = var_floor
+if (var_input > (var_floor + 5*round_precision/10) ) then
+var_rounded = var_ceil
+end
+return(var_rounded)
+end -- end function
+var_input = 123.44900000003   -- input variable to be rounded
+round_precision = 10     -- rounding precision, use: 100, 10, 1, 0.1, 0.01 etc.
+var_output = round_LUA(var_input, round_precision)
+print(var_input)
+print(var_output)
+</code>

Unofficial FEMM documentation by Dr Stan Zurek

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Unofficial
FEMM
documentation
by Dr Stan Zurek