all the math regions shows black.
How do you isolate M?

Edited by user 31 January 2021 07:04:26(UTC)  | Reason: Not specified

This works for me, Thank you.

In fact it is a behavior that I did not expect. I noticed that you defined "M" symbolically. But it wasn't enough. With "eval" it works but I don't understand why

sergio

Hi Sergio. My interpretation, but not sure if it's actually the reason why. I think in terms of the Mathematica's Hold[x] instruction, or the equivalent Maple quoting with 'x'; those instructions make x remain unevaluated. In a mathematica procedure f(x), if previously you have x:=2 and call f[Hold[x+3]], f receive 'x+3' but not 5. SMath try to preserve all things unevaluated for make symbolic simplifications in cases of mixing symbolic and numeric calculations. For this is that XY plot and vectorize() function receive arguments unevaluated. In that sense eval() is the opposite to hold(), function that actually I ask for as feature suggestion.

The best example of that hold exists in SMath is the way that derivatives are evaluated, like in mathcad: you first define x:=2, then call diff(x^3,x) = 12. Notice that diff() don't receive 8 and 2 as arguments, but x^3 and x, just because you cant differentiate with something like diff(8,2). So, some functions in SMath gets it's arguments with 'hold', and it seems that vectorize() is another example, but others not.

Even that, also there are some other internals with an strange behavior for all functions: if you think that you write a function which goes to receive a big matrix as argument M, your first step in the body procedure must to be M:=M for ensure that it goes to be only numerical. Ndtma expose that in an example, but can't remember nor find where.

Best regards.
Alvaro.

eval("expression" -
Converts the given expression from symbolic to numeric notation.
Being a function evaluation, it assigns to same name or another name.
Thus, by same token isolates and that's what X_Y wants, it wants its
own stuff [data, f(x), f(x,y) as 'f' for contour]
Within a for loop, it has the virtue of isolating internally
within the loop itself, then accelerates the for loop result.
It has the same effect as spooling to file, not confirmed Bible,
just from observation(s) ... forgive my Grand Discours made short.
Some functions that have only numeric parameters must be redefined
via the eval(,) to convert scalar 'x' for plotting on Quick plot @.
For instance: the Hypergeometric Gamma
Cheers ... Jean

This function works partially and does not completely cover the component (you can't change the properties of the curve with it). I do not recommend using it everywhere, because I am planning a more direct control mechanism.

You can find a usage example here and here.

Edited by user 22 February 2021 17:13:21(UTC)  | Reason: Not specified

Hi, there is way to ratote the X axes values?

No, that didn't work.




I need to change the orientation of the text in x axes.

I think it is about rotating the tick labels on the x axis such that they don't overlap.

Unfortunately this is not possible, at least not exposed to the settings interface.

You could, however, change number format and tick spacing to mitigate the problem.

If the maxima plugin is an option for you, then you can use the draw library.


Blatt1.sm (15kb) downloaded 20 time(s).

In latest SS 99.7799, I experience a label error similar to image as shown.
Some previous files show this error.