In which system of units do we get outputs of functions...i mean if we get a plot using scope ..we get different values of x and t ...but are they in S.I system..how do we come to knw..

In which system of units do we get outputs of functions...i mean if we get a plot using scope ..we get different values of x and t ...but are they in S.I system..how do we come to knw..

Answer 1

[Roger Stafford]

The interpretation of numerical quantities within a computer in terms of units is always a matter of understanding between programmers and users, and is not something inherent in the computer. For example in the matlab computation

 y = sin(x)

the user must understand that the x variable is in units of radians and the y variable is a purely numeric ratio which varies from -1 to +1 (for real numbers.)

This means a user must always carefully read the documentation for each function that is being used.

[Hrushikesh]

suppose i have a graph of y=sin(x) ...i agree with x is in radians..but y is the measure of amplitude of sin wave in y dirn..so cannot we use the data on y axis for our calculations...in simple words suppose amplitude of sine wave is 0.1 as shown in graph...so can i say it is 0.1 metres or millimetres..depending upon my units of wavelength and velocity .....