How does the DM42 accuracy compare to other calculators ?

12222017, 07:00 PM
Post: #25




RE: How does the DM42 accuracy compare to other calculators ?
(12212017 07:01 PM)Dieter Wrote: By pressing CPX on the 34s you do not tell the calculator to return a complex result. Instead, you tell it to calculate the function of a complex number in X and Y (instead of a real number in X). Of course the result may be real: Try 1 ENTER 0 CPX x² and get –1 as the correct answer. That is likely technically correct, but when I tried taking the log of 2 on the 34s, it tells me domain error, or something like that. While on say, my 42s, it simply returns a complex number (since I have complex results turned on). I suppose the problem with that method for the 34s is that you would have to have some indicator that there is a complex result stored in both the x and y register. Maybe there is a way to do that (some complex results equivalent switch). So in this case, I tried ln(2), received an error, and then did ln(2 +i0), which returns the expected result. That's why I was saying you almost had to know the result was going to be complex. Unless there is some cpxres switch I haven't found (likely). 

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