Recent content by DoubleHelics

Hello, I just want to get people's idea on something: I am using MATLAB for doing statistical analysis since I am very much used to MATLAB than using other statistical software. Do you think MATLAB is good to use for that or do you think it has inherent disadvantages compared to other programs...

Ok, I think I understand that I am inventing a new type of derivative there, which does not make physical sense. (Thanks for bearing with me) I have one more question. Let's assume we have three variables y, x, and t such that t is again independent variable. x and y are functions of t: y =...

Alright, I also thought that it should be the total derivative (as I was asking at the end of my last post). Ok then let me put it this way with another example, which I think should better illustrate my problem in understanding: Let's say I have three variables: x,y,z, which are parametrized...

Ok, I think I understand what you mean. But, I thought t is the independent variable in the mechanics problems. (Or am i wrong?) Let me give an example: Say we are analyzing the movement of a point mass, which is thrown from Earth's surface (assumed planar for the problem) with a velocity v...

clem, thanks much for the explanations. But I am not sure what you mean by \frac{\partial x}{\partial y} is "the change in x keeping x fixed.", do you mean the change in x keeping t fixed? Could you elaborate on that please?

But mathematically, I can find a relation between x(t) and y(t), then I could compute the partial derivative, right? Would that still be zero?

Hello, I have a simple question. Let's say we have a mechanical system with 2 degrees of freedom. Say the generalized coordinates (which are independent from each other in terms of constraints) are x and y. When we solve Lagrange-Euler equations for this system, we get time evolutions of...