Re: Scatter Plotting

[Isak Delberth Davids]

On 6 June 2016 at 00:31, Stephen H. Dawson <address@hidden> wrote:

  x = [x1, x2, x3, ...];
  y = [y1, y2, y3, ...];
  z = [z1, z2, z3, ...];


Yes, I think I see how to do this now. I will work in it over the next
week and see where I end up.

I appreciate your kind assistance.

Thank You,
Stephen H. Dawson
(865) 804-3454
http://www.linkedin.com/in/shdcs


On 06/05/2016 06:25 PM, Mike Miller wrote:
> On Sun, Jun 05, 2016 at 18:13:38 -0400, Stephen H. Dawson wrote:
>> Catchy, nice functionally.
>>
>> Well, perhaps I am not asking my question properly. If I have 3 columns
>> in a spreadsheet of x, y, and z values, how do I enter those 3 values
>> for each location into the scatter3 function?
>   x = [x1, x2, x3, ...];
>   y = [y1, y2, y3, ...];
>   z = [z1, z2, z3, ...];
>   scatter3 (x, y, z);
>
> The demos generate random x, y, and z, but I think they pretty clearly
> show how the coordinate vectors are passed to the function, as well as
> how to pass additional arguments to set the size or color of each of the
> points.
>
> It's the same as line plotting, the function takes in individual arrays
> for each independent dimension of the plot. Corresponding values in
> those arrays are the points of the line, histogram, scatter plot, or
> surface that is being plotted.
>
> Is that what you are asking about?
>

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Hi,

and since you mentioned "columns in a spreadsheet", this is how you can read and use data from a spreadsheet.

% reading spreadsheat
dataSet = xlsread('dataFile.xlsx')

% extract individual columns one through three
x = dataSet(:,1)
y = dataSet(:,2)
z = dataSet(:,3)

% plotting with data read from spreadsheet
scatter3(x, y, z);

I think this requires that you have the octave-io package installed and loaded.

Cheers,

Isak Delberth DAVIDS