pari

[davieddy]

Initialize

x = x + dx
y= y + dy
dx = dx - k*y
dy = dy - k*x
PLOT (x,y)

Keep taking the medicine

TRUST ME

D

[science_man_88]

Originally Posted by devarajkandadai

? plot(x=-5,5,sqrt(25-x^2))
4.9993701 |''''''''''''''''''''''__xxx""""""""xxx__''''''''''''''''''''''|
          |                  _xx"                  "xx_                  |
          |               _x"                          "x_               |
          |             _x                                x_             |
          |           _"                                    "_           |
          |         _x                                        x_         |
          |        _                                            _        |
          |       x                                              x       |
          |      "                                                "      |
          |     "                                                  "     |
          |    "                                                    "    |
          |   "                                                      "   |
          |  x                                                        x  |
          |                                                              |
          | "                                                          " |
          |                                                              |
          |x                                                            x|
          |:                                                            :|
          |:                                                            :|
          :                                                              :
          :                                                              :
        0 _,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,_
          -5                                                             5
(10:20) gp >

I got the above which is actually a semi-circle; how do I get a complete circle pl?

well each x value would need 2 solutions I would think:

plotlines(w,X,Y,{flag=0}): draws an open polygon in rectwindow w where X and Y contain the x (resp. y) coordinates of the vertices. If X and Y are both single values (i.e not vectors), draw the
corresponding line (and move cursor). If (optional) flag is non-zero, close the polygon.

may work but you need a rectwindow made first

[science_man_88]

Originally Posted by axn

Something that almost works

plot(x=-5,5,sqrt(25-x^2)); plot(x=-5,5,-sqrt(25-x^2))

yeah I tried doing the ploth version it still needs a copy and paste plus some resizing lol

[CRGreathouse]

Here's a crude technique that works for that case:

ploth(x=-5,5,sqrt(25-x^2)*(-1)^random(2),64)

[LaurV]

If the threads were merged, then OP's post #8 and my post #10 should be deleted. And this current post too. Thanks.

[science_man_88]

Originally Posted by CRGreathouse

Here's a crude technique that works for that case:

ploth(x=-5,5,sqrt(25-x^2)*(-1)^random(2),64)

ploth(x=-5,5,(5-abs(x))*(-1)^random(2),64)

works for a rough diamond

[science_man_88]

how could you ploth a rectwindow with multiple curves/lines in it, I know how to make rectwindows and I know how write to a rectwindow I don't see how to ploth the results.

edit: think I found it (plotrecthraw) but don't see how to get it working,okay got it working but not exactly what I wanted by the looks of it.

[LaurV]

Why my solution in post #9 is not good for you?
Pari's "ploth" is a very clever function, it can plot vectors of functions, even recursion, in many different parametric ways. Try playing with the last "1", make it "0" or none. Or RTFM, it has good examples.

If you keep that fixed idea of using the sqrt(blabla) function, why not try:

ploth(x=-5,5,[sqrt(25-x^2),-sqrt(25-x^2)])

edit: try this for a start:
ploth(x=-5,5,[x^3/25,5*sin(x),x*sin(20*x)/5-1.1*x,sqrt(25-x^2),-sqrt(25-x^2)])

[devarajkandadai]

Originally Posted by science_man_88

how could you ploth a rectwindow with multiple curves/lines in it, I know how to make rectwindows and I know how write to a rectwindow I don't see how to ploth the results.

edit: think I found it (plotrecthraw) but don't see how to get it working,okay got it working but not exactly what I wanted by the looks of it.

Wd be glad to receive step by step instruction for drawing rectwindow.

[science_man_88]

Originally Posted by devarajkandadai

Wd be glad to receive step by step instruction for drawing rectwindow.

see that's kinda my problem I can enter data into them but can't get them by name:

plotinit() initializes a rectwindow
plotrecth() writes data to a rectwindow
plotclip() clips the data to the correct size.
but I can't figure out which one draws the results.

[kar_bon]

A simple graph of a circle in Pari:

ploth(X=0,2*Pi,[sin(X),cos(X)], "Parametric")