equivalent to rbscript

[cjmj]

Please I would need to know the equivalent to RealBasic Scripts in LiveCode. Because I need to create an app where the user could introduce a mathematical function to plot it.
Thank you in advance

[Klaus]

Hi cjmj,

I don't think that someone will post a more or less complete comparison chart
RB commands <-> LiveCode commands, so if you could be a bit more specific,
we might be able to help you

And welcome to the forum!

In the meantime you might want to take a look at these stacks:
http://www.runrev.com/developers/lesson ... nferences/


Best

Klaus

[cjmj]

Thank you Klaus. I want to create in the stack a text entry field, where the user introduce something like that: "y = x^2 -3x +2", then when the user pushes a button, the program draws it.

[BvG]

You need math to do that, not a specific programming language, for example:

Code: Select all

put field "formula" into theFormula
repeat with x = 1 to 10
  put theFormula into theTemporary
  replace "x" with x in theTemporary
  put x & comma & value(theTemporary) & return after theData
end repeat
-- draw data here using math

[cjmj]

Thank you BvG, that´s great!, but I don´t understand what you want to say with "math" in this case.

[BvG]

Screen coordinates are the same as carthesian coordinates (altho inverted because LC starts at the topleft with 0,0). All things that need positioning on (as in precise on a certain point) a carthesian system are algebra. Algebra is math. You do the math.

[cjmj]

OK BvG, I understand. By the way, is there any example of code of math graphics on carthesian system?, it would be very useful for me to survey it.
Thanks for your kindness

[BvG]

Sure, here you go:

http://en.wikipedia.org/wiki/Cartesian_ ... ate_system
http://www.mathsisfun.com/data/cartesia ... ctive.html
http://mathworld.wolfram.com/CartesianCoordinates.html

Just do a google search, a lot of things will pop up

[cjmj]

Sorry BvG I would want to say livecode code.
Thanks

[BvG]

I don't understand then I guess, didn't I say it's math, and not code?

[dave_probertGA6e24]

Hi cjmj,

I think you need to look in the LC dictionary for the references to "points" in the graphic object.

You can assign the points that are generated by your math functions to lines, which will then be drawn.

Code: Select all

set the points of graphic "fred" to myDataPointsList

where myDataPointsList is an array of x,y values.

That should give you a programmatical start to creating graphs of your data.

Cheers,
Dave

[cjmj]

I think it is just I need.
I´ll take a look to "point" in the Dictionary
Thanks
Carlos