Why does:
diffpressure = gradient(pressure)./gradient(density);and
diffpressure = diff(pressure)./diff(density);give drastically different results? The derivative using each method are completely different. See attached figure
MATLAB: Diff vs. gradient
differential equationsplot
Related Solutions
syms xa=62;b=95;y = (3*x.^2.*sin(a*x))./(x.^2+b);dy = diff(y)With your gradient method you are only taking the derivative along the y dimension, wheras the del2 operator approximates Laplace's differential operator:
Related Question
- Hi all, i have fitted a Four Parameters Logistic Regression for the X and Y data. i want to find the local slope of each data point, i would appreciate if somebody can help me on this , the attached image shows the fit
- About gradient and diff
- Creating a code that calculates forward difference from a set of data
- Tangent line to a curve at a given point
Best Answer