initial condition settings！！！

[whtwu]

Dr Lu, thank you for your extraordinary work:
my engineering background is to add an initial pulse excitation of 1000N at a certain position of the beam, when using deepxde, I don't know if the Dirac function is used in the initial conditions to represent this pulse excitation, The following is the wrong code I wrote myself, how should the correct code be expressed?
ic = dde.IC(geomtime, lambda x: 1000*DiracDelta(x[:, 0:1]-0.2), lambda _, on_initial: on_initial)

[lululxvi]

#200

[whtwu]

@lululxvi Thank you very much your reply. I have a couple of questions to help me understand Deepxde.
The first is that I add a vector not a function to the initial conditions. The code is as follows. Is this possible?
initial_values = np.load('initial_values.npy') #initial_values = initial_values.flatten()[:, None] ic = dde.IC(geomtime, lambda x: initial_values, lambda _, on_initial: on_initial)
And is the num_initial selection random? How do I set up to select points in order to match my initial data set, looking forward to your reply

[forxltk]

Seems you should use PointSetBC, not IC.

[whtwu]

My engineering background is that there is a pulse excitation on the beam, but I plan to use the data from MATLAB as the initial condition, you mean in the code implementation, it is possible to use PointSetBC instead of IC, right?

[whtwu]

I may understand that IC is mostly given by a function. In PointSetBC, a series of points at time 0 along the x direction can be set to achieve the same effect as IC.

[lululxvi]

Yes.