Symbolic package: Difference between revisions

Symbolic package (edit)

580 bytes added , 17 February 2017

17

edits

@@ Line 98: / Line 98: @@
   plot(x1,y)
   grid minor on
+* '''Demo of how to suppress a warning about converting from floating point numbers to symbolic numbers.
+## Demo of how to use a number (which was calculated in an octave
+## variable) in a symbolic calculation, without getting a warning.
+## use octave to calculate some number:
+ a=pi/2
+## now do some work with the symbolic pkg
+ syms x
+    f = x * cos(x)
+    df = diff(f)
+## Next get the number into a symbolic variable
+## convert to string first
+    aa=mat2str(a)
+## and now to a symbolic variable.
+    ww=sym(aa)
+## and now use it
+    vpa(subs(df, x, ww), 28)
 </source>