Density-Temperature diagram
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I have this semilog diagram with temperature (y axis) and viscosity(x axis). The diagram is linear. Chosen one type of oil, I need an equation that returns viscosity's values entering a particular value of temperature. How can i do? I've tried something like this, but it's totally wrong:
x =[10,50];
y =[50,0];
C = polyfit(log10(x),y,1);
m = C(1);
k = C(2);
T = 100;
vi = polyval(C,log10(x))
1 个评论
Rafael Hernandez-Walls
2020-9-29
x =[10,50];
y =[50,0];
C = polyfit(log10(x),y,1);
m = C(1);
k = C(2);
T = 100;
vi = polyval(C,log10(x))
回答（1 个）
Alan Stevens
2020-9-29
编辑：Alan Stevens
2020-9-29
Perhaps you should have T instead of x in the last line (and have you got the two parameters the wrong way round? You want to get viscosity (x) from temperature (y)).. Also look up interp1.
x =[10,50];
y =[50,0];
C = polyfit(y,log10(x),1);
m = C(1);
k = C(2);
T = 100;
vi = polyval(C,T);
vi = 10^vi;
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