python has matplotlib,. I don t know whether CPP has the same level of drawing library. If you want to achieve the drawing effect of matlab in the MFC framework, you can achieve some simple operations like matlab, such as zooming in and out, coordinate ...
topic description A rookie of matlab programming asks all the great gods to give you an idea to create an entry in the Filter data filter with matlab programming sources of topics and their own ideas there is a raw data on hand, no tags, only numb...
import sympy x em sympy.sin (f) z=r*sympy.sin (l) how to find the Jacobian matrix? xpenr sympy.cos (l) sympy.cos (f) ypenr sympy.cos (l) sympy.sin (f) z=r*sympy.sin (l) ? J = [cos (l) cos (f),-r sin (l) cos (f),-r cos (l) * sin (f)] [c...
Why can t symbolic variables be logarithmic? an is a symbolic variable, and I want to generate another symbolic variable, ln (a), to display an error. But pow (a pencils 4) is OK. Why? ...
how does matlab use one time column matrix [time] to find another 4-column matrix [time, XMagi X] corresponding to row data-the two matrices are not the same length? ...
1 recently in writing SFTP upload file, read a pile of code on the Internet, a lot of experiments, always unsuccessful, here to inquire func Sftp_connect(user, pbi, local string) { fmt.Println(user, pbi, local) pub := PublicKeyFile(pbi) ssh...
git log-- oneline-- all then what s the difference between git checkout and git reset? found some information but didn t understand it. I hope God can explain it in popular language. Tweet ...
does anyone know how weex uses chart charts ...
problem description I want to query whether a field is null. If it is null, the query result returns flase. If it is not null, the result returns true. What should I do? Because the field value is very long, and you don t need to get the value of the...
Isn t regular used to match strings? Why is there the following result? I use it to match arrays! ...