Smooth Function not working

When I try to use the smooth function it says that it is an undefined function of variable. I am trying to analyze data of a graph. Here is the script:

LOWER_LIMIT = 60;
SULFUR_LIMIT = 325;
UPPER_LIMIT = 600;

T_Sulfur = Ts((Ts>LOWER_LIMIT) & (Ts<SULFUR_LIMIT));
T_Carbon = Ts((Ts>SULFUR_LIMIT) & (Ts<UPPER_LIMIT));

W_Sulfur = smooth(Weight((Ts>LOWER_LIMIT) & (Ts<SULFUR_LIMIT)),75);
W_Carbon = smooth(Weight((Ts>SULFUR_LIMIT) & (Ts<UPPER_LIMIT)),100);

plot(T_Sulfur, W_Sulfur * 100 / max(W_Sulfur));
plot(T_Carbon, W_Carbon * 100 / max(W_Carbon));
xlabel('Temperature (°C)');
ylabel('Weight (%)');

RelativeSulfurWeightLoss=((max(Weight((Ts>LOWER_LIMIT) & (Ts<SULFUR_LIMIT)))) - (min(Weight((Ts>LOWER_LIMIT) & (Ts<SULFUR_LIMIT)))) / (max(Weight((Tx>LOWER_LIMIT) & (Ts<SULFUR_LIMIT)))))
RelativeSulfurWeightRemaining = 1 - ((max(Weight((Ts>LOWER_LIMIT) & (Ts<SULFUR_LIMIT)))) - (min(Weight((Ts>LOWER_LIMIT) & (Ts<SULFUR_LIMIT)))) / (max(Weight((Tx>LOWER_LIMIT) & (Ts<SULFUR_LIMIT)))))
RelativeCarbonWeightLoss=((max(Weight((Ts>SULFUR_LIMIT) & (Ts<UPPER_LIMIT)))) - (min(Weight((Ts>SULFUR_LIMIT) & (Ts<UPPER_LIMIT)))) / (max(Weight((Tx>SULFUR_LIMIT) & (Ts<UPPER_LIMIT)))))
RelativeCarbonWeightRemaining = 1 - ((max(Weight((Ts>SULFUR_LIMIT) & (Ts<UPPER_LIMIT)))) - (min(Weight((Ts>SULFUR_LIMIT) & (Ts<UPPER_LIMIT)))) / (max(Weight((Tx>SULFUR_LIMIT) & (Ts<UPPER_LIMIT)))))

[KSSV]

smooth comes with curvefit toolbox...do you have that toolbox? What does which smooth gives?

Answer 1

[Torsten]

Type "ver" to see whether you have a licence for the Curve Fitting Toolbox.

Best wishes

Torsten.

[Emily Dickens]

I do have the Curve Fitting Toolbox, but it still isn't working.

[Torsten]

Other commands from the Curve Fitting Toolbox work, e.g. "fit" ?

Best wishes

Torsten.

Answer 2

[Justin Lines]

Was the smooth function always part of an add on?