plotting time discrete data

[leprechaun]

Hi everybody!

I have a vector of time-discrete data. How do I plot a one dimensional vector?
Is there an app that does the Job or a smart way?
Either simply dots at the sampled Points or a polyline (implied polyline would be great anyway)?

say M1:=[0,1,2,3,4,0,1,2,3,4,0,1,2,3,4]; is a sampled sawtooth where the index into the vector is supposed to be my sample index. No absolute time needed, just implied tn.

[Didier Lachieze]

You can use the "Statistics 1Var" app, after selecting it you need to move your data to the D1 list:
   
then in the Symb view select Line as the type of Plot:
   
and with Plot you can view your data:
   

[leprechaun]

I will present some results of my work. Not nearly satisfactional....

I decided to make a polyline(M) function that accepts a 1-dimensional vector as argument. It should use LINE_P() for plotting a polyline. That sounds nice, but I have the Feeling that i am stuck.
For my general understanding: LINE_P accepts a Vector of Points, i.e. vectors with 2 entries for the 2-dimensional Problems and a Vector of indices into the above buffer that define line segments. Similar to a vbo I think?

Help or an example on LINE_P with Point lists would be great!

second problem: when trying to convert my 1-dim vector into a points array I fail.

Code:


EXPORT polyline(data)
BEGIN

LOCAL v_data := MAKEMAT(I,length(data),2);
v_data(2):=TRN(data); //How to assign? What should the Points Array look like?

//LOCAL l_data:={{1,2},{2,3},{3,4},{4,5},{5,6}}; //How can I build such a vector in Dependance of length(data)? And row/column? Which format

//Will deal with that later.......
//RECT();
//LINE_P(v_data,l_data);
//FREEZE;

RETURN v_data; //Output for debugging
END;

How can assign a column in v_data? I realize that I am totally confused with row- and column vectos AND I do not know the best way to manipulate either with my prime.

Thanks a lot for your help. It will lead to a working function, hopefully!

[leprechaun]

Thanks Didier!

However maybe you can help me getting my polyline() function working? It is a good way to learn.

[Didier Lachieze]

(06-23-2015 02:11 PM)leprechaun Wrote:  Thanks Didier!

However maybe you can help me getting my polyline() function working? It is a good way to learn.

Here is a very rough implementation of the polyline() function, you'll have to adjust the pixel mapping to your needs:

Code:

EXPORT polyline(data)
BEGIN
  LOCAL x_max, y_max;
  LOCAL L_Points, L_Lines;

  x_max:= length(data); y_max:=MAX(data);
  L_Points := MAKELIST({IP(I*300/x_max)+10, 220-IP(data(I)*220/y_max)+10},I,1,x_max);
  L_Lines := MAKELIST({I,I+1},I,1, x_max-1);


  RECT();
  LINE_P(10,230,320,230); LINE_P(10,10,10,230);   // Draw X & Y Axis
  LINE_P(L_Points,L_Lines,[[1,0],[0,1]]);
  FREEZE;

  RETURN L_Points; //Output for debugging
END;

[Marcus von Cube]

Here is another rather simple way using the Function app: