Hi all, wonder if you can help, i am having problems with using the sin, cos, asin,acos etc features. I keep getting the little black box at my final answer. I am not really sure if it is a bug as such as when i upload the calculation to the "Live" page on this website it resolves just fine (i have tried to load this calculation onto several computers and they all just resolve to black box)

thanks in advance

Hi, thank you for your reply, i am just trying to upload the file so people can look at it to get a better idea, what i mean is that the equation is not resolving on my (or several other computers that i have installed smath on to check)

i will try to take a screen shot at least so you can (should be on in 2 mins if you are still around

many thanks

EDIT***

link to screen shot

http://picasaweb.google....GvRg#5496454430477863026

thanks

Edited by user 21 July 2010 23:10:44(UTC)  | Reason: Not specified

Sorry, I did not get it in the first place

I might be wrong but did you check the Calculation=>Auto calculation in the main menu. Is it On (checked) or Off (Unchecked). If unchecked you will not get any result, like in your screenshot.

Regards,
Radovan

Hi, yes i have checked and also clicked refresh, it is quite strange, as by playing with switching between radians & degress for the "Angle" setting, one of the equations appeared to have resolved, but after a "recalculate" it vanished

yea i tried to set the "Angle" to radians and then just convert the answer after, but i just get a strange answer with "i" after a very small number (in the magnitude of x10(-14)), anyway as it works on live, it should be okay in the next release

thanks again to you both for you very promt response!

good night

*.sm files stores information about Angles option and when you save file as *.xmcd this info is lost... maybe this is the reason of why *.xmcd file is opens correctly.

rosswhittingham, I've checked your examples.

Here is what I get with a latest SMath Studio build (I've modified your files a bit):


Figure 1: Winch snatch block_mod.sm


Figure 2: aframe_mod.sm

About errors you found in SMath Studio 0.88. As Radovan said it is due to the Angles option - please check this topic out for details. Actually bug is fixed but I really recommend you to use degrees Unit instead of the global angles option (also see the second post on that topic by Radovan). The second problem you've mentioned about imaginary part after using inverse trigonometric functions - this is an accuracy error and this is also fixed in SMath Studio 0.89 as you can see on the pic above.

Best regards, Andrey Ivashov.

P.S.: In the aframe.sm file you use Units, but this use case is very strange... check out the first screenshot to see how Units should be used normally.
P.P.S: Zip-archive with all related files: for_rosswhittingham.zip.

Edited by user 22 July 2010 02:14:39(UTC)  | Reason: Not specified