Azzera filtri
Azzera filtri

I want vector surface plot

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stelios loizidis
stelios loizidis il 30 Mag 2022
Risposto: Star Strider il 30 Mag 2022
Hello,
I have three vectors: Prices:1X30, Position:1X30 and Quantity:1X30 and I want to do the surface plot. I get the following error:
"Z must be a matrix, not a scalar or vector."
Your help is important.
  2 Commenti
KSSV
KSSV il 30 Mag 2022
As Prices, Position, Quantity are three vectors, you cannot have a surface plot. You need to have one matrix of size 30x30 to have a surface plot.
stelios loizidis
stelios loizidis il 30 Mag 2022
Do you think it's right to do the 30x30 matrix with these three vectors?

Accedi per commentare.

Risposte (2)

KSSV
KSSV il 30 Mag 2022
Prices = 1:30 ;
Position = 1:30 ;
Quantity = rand(1,30) ;
Quantity = repmat(Quantity,30,1) ;
surf(Prices,Position,Quantity)

Star Strider
Star Strider il 30 Mag 2022
I am not certain what result you want.
Try this —
Prices = rand(1,30); % Use Actual Vector
Position = rand(1,30); % Use Actual Vector
Quantity = rand(1,30); % Use Actual Vector
Prv = linspace(min(Prices), max(Prices), numel(Prices));
Psv = linspace(min(Position), max(Position), numel(Position));
[Pr,Ps] = ndgrid(Prv,Psv);
Qt = griddata(Prices(:),Position(:),Quantity(:),Pr,Ps);
figure
surfc(Pr, Ps, Qt)
grid on
xlabel('Prices')
ylabel('Position')
zlabel('Quantity')
.

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