Creation of a regular grid¶
In this example we will demonstrate how to create a regular grid. Note that a regular grid is a particular mesh of .
Here we will assume it represents the time as it is often the case, but it can represent any physical quantity.
A regular time grid is a regular discretization of the interval into points, noted .
The time grid can be defined using where is the number of points in the time grid. the time step between two consecutive instants and . Then, and .
Consider a multivariate stochastic process of dimension , where , and is interpreted as a time stamp. Then the mesh associated to the process is a (regular) time grid.
from __future__ import print_function import openturns as ot import openturns.viewer as viewer from matplotlib import pylab as plt import math as m ot.Log.Show(ot.Log.NONE)
tMin = 0. tStep = 0.1 n = 10 # Create the grid time_grid = ot.RegularGrid(tMin, tStep, n)
Get the first and the last instants, the step and the number of points
start = time_grid.getStart() step = time_grid.getStep() grid_size = time_grid.getN() end = time_grid.getEnd() print('start=', start, 'step=', step, 'grid_size=', grid_size, 'end=', end)
start= 0.0 step= 0.1 grid_size= 10 end= 1.0
draw the grid
time_grid.setName('time') graph = time_grid.draw() view = viewer.View(graph) plt.show()
Total running time of the script: ( 0 minutes 0.069 seconds)