|
|
|
@ -1,5 +1,5 @@
|
|
|
|
|
from __future__ import division
|
|
|
|
|
from wafo.misc import meshgrid, gravity
|
|
|
|
|
from wafo.misc import meshgrid, gravity, cart2pol, pol2cart
|
|
|
|
|
from wafo.objects import mat2timeseries, TimeSeries
|
|
|
|
|
import warnings
|
|
|
|
|
|
|
|
|
@ -180,6 +180,12 @@ def plotspec(specdata, linetype='b-', flag=1):
|
|
|
|
|
NOTE: - lintype may be given anywhere after S.
|
|
|
|
|
|
|
|
|
|
Examples
|
|
|
|
|
>>> import numpy as np
|
|
|
|
|
>>> import wafo.spectrum.models as sm
|
|
|
|
|
>>> Sj = sm.Jonswap(Hm0=3, Tp=7)
|
|
|
|
|
>>> S = Sj.tospecdata()
|
|
|
|
|
>>> plotspec(S,1)
|
|
|
|
|
|
|
|
|
|
S = demospec('dir'); S2 = mkdspec(jonswap,spreading);
|
|
|
|
|
plotspec(S,2), hold on
|
|
|
|
|
plotspec(S,3,'g') % Same as previous fig. due to frequency independent spreading
|
|
|
|
@ -250,8 +256,8 @@ def plotspec(specdata, linetype='b-', flag=1):
|
|
|
|
|
spectype = specdata.type.lower()
|
|
|
|
|
stype = spectype[-3::]
|
|
|
|
|
if stype in ('enc','req','k1d') : #1D plot
|
|
|
|
|
Fn = freq(-1) # Nyquist frequency
|
|
|
|
|
indm = findpeaks(data,n=4)
|
|
|
|
|
Fn = freq[-1] # Nyquist frequency
|
|
|
|
|
indm = findpeaks(data, n=4)
|
|
|
|
|
maxS = data.max()
|
|
|
|
|
# if isfield(S,'CI') && ~isempty(S.CI),
|
|
|
|
|
# maxS = maxS*S.CI(2);
|
|
|
|
@ -1714,8 +1720,8 @@ class SpecData1D(WafoData):
|
|
|
|
|
>>> x2, x1 = S.sim_nl(ns=20000,cases=20)
|
|
|
|
|
>>> truth1 = [0,np.sqrt(S.moment(1)[0][0])] + S.stats_nl(moments='sk')
|
|
|
|
|
>>> truth1[-1] = truth1[-1]-3
|
|
|
|
|
>>> truth1
|
|
|
|
|
[0, 1.7495200310090628, 0.18673120577479821, 0.06198852126241805]
|
|
|
|
|
>>> np.round(truth1, 3)
|
|
|
|
|
array([ 0. , 1.75 , 0.187, 0.062])
|
|
|
|
|
|
|
|
|
|
>>> funs = [np.mean,np.std,st.skew,st.kurtosis]
|
|
|
|
|
>>> for fun,trueval in zip(funs,truth1):
|
|
|
|
@ -1736,8 +1742,8 @@ class SpecData1D(WafoData):
|
|
|
|
|
>>> x2 = np.hstack(x)
|
|
|
|
|
>>> truth1 = [0,np.sqrt(S.moment(1)[0][0])] + S.stats_nl(moments='sk')
|
|
|
|
|
>>> truth1[-1] = truth1[-1]-3
|
|
|
|
|
>>> truth1
|
|
|
|
|
[0, 1.7495200310090628, 0.18673120577479821, 0.06198852126241805]
|
|
|
|
|
>>> np.round(truth1,3)
|
|
|
|
|
array([ 0. , 1.75 , 0.187, 0.062])
|
|
|
|
|
|
|
|
|
|
>>> funs = [np.mean,np.std,st.skew,st.kurtosis]
|
|
|
|
|
>>> for fun,trueval in zip(funs,truth1):
|
|
|
|
@ -2811,10 +2817,10 @@ class SpecData1D(WafoData):
|
|
|
|
|
title = 'Directional Spectrum'
|
|
|
|
|
if self.freqtype.startswith('w'):
|
|
|
|
|
labels[0] = 'Frequency [rad/s]'
|
|
|
|
|
labels[2] = 'S(w,\theta) [m^2 s / rad^2]'
|
|
|
|
|
labels[2] = r'S(w,$\theta$) $[m^2 s / rad^2]$'
|
|
|
|
|
else:
|
|
|
|
|
labels[0] = 'Frequency [Hz]'
|
|
|
|
|
labels[2] = 'S(f,\theta) [m^2 s / rad]'
|
|
|
|
|
labels[2] = r'S(f,$\theta$) $[m^2 s / rad]$'
|
|
|
|
|
|
|
|
|
|
if self.angletype.startswith('r'):
|
|
|
|
|
labels[1] = 'Wave directions [rad]'
|
|
|
|
@ -2824,18 +2830,18 @@ class SpecData1D(WafoData):
|
|
|
|
|
title = 'Spectral density'
|
|
|
|
|
if self.freqtype.startswith('w'):
|
|
|
|
|
labels[0] = 'Frequency [rad/s]'
|
|
|
|
|
labels[1] = 'S(w) [m^2 s/ rad]'
|
|
|
|
|
labels[1] = r'S(w) $[m^2 s/ rad]$'
|
|
|
|
|
else:
|
|
|
|
|
labels[0] = 'Frequency [Hz]'
|
|
|
|
|
labels[1] = 'S(f) [m^2 s]'
|
|
|
|
|
labels[1] = r'S(f) $[m^2 s]$'
|
|
|
|
|
else:
|
|
|
|
|
title = 'Wave Number Spectrum'
|
|
|
|
|
labels[0] = 'Wave number [rad/m]'
|
|
|
|
|
if self.type.endswith('k1d'):
|
|
|
|
|
labels[1] = 'S(k) [m^3/ rad]'
|
|
|
|
|
labels[1] = r'S(k) $[m^3/ rad]$'
|
|
|
|
|
elif self.type.endswith('k2d'):
|
|
|
|
|
labels[1] = labels[0]
|
|
|
|
|
labels[2] = 'S(k1,k2) [m^4/ rad^2]'
|
|
|
|
|
labels[2] = r'S(k1,k2) $[m^4/ rad^2]$'
|
|
|
|
|
else:
|
|
|
|
|
raise ValueError('Object does not appear to be initialized, it is empty!')
|
|
|
|
|
if self.norm != 0:
|
|
|
|
@ -2975,7 +2981,7 @@ class SpecData2D(WafoData):
|
|
|
|
|
if (self.args[0][0]==-pi):
|
|
|
|
|
self.data[ntOld,:] = self.data[0,:]
|
|
|
|
|
else:
|
|
|
|
|
ftype = self.freqtype
|
|
|
|
|
#ftype = self.freqtype
|
|
|
|
|
freq = self.args[1]
|
|
|
|
|
theta = linspace(-pi,pi,ntOld)
|
|
|
|
|
[F,T] = meshgrid(freq,theta)
|
|
|
|
@ -2985,7 +2991,7 @@ class SpecData2D(WafoData):
|
|
|
|
|
self.data[nt,:] = self.data[0,:]
|
|
|
|
|
self.data = interp2(freq,np.vstack([self.theta[0]-dtheta,self.theta]),
|
|
|
|
|
np.vstack([self.data[nt,:],self.data]),F,T,method)
|
|
|
|
|
self.args[0] = theta;
|
|
|
|
|
self.args[0] = theta
|
|
|
|
|
|
|
|
|
|
elif stype=='k2d':
|
|
|
|
|
#any of the 2D wave number types
|
|
|
|
@ -3053,8 +3059,8 @@ class SpecData2D(WafoData):
|
|
|
|
|
>>> SD = D.tospecdata2d(sm.Jonswap().tospecdata(),nt=101)
|
|
|
|
|
>>> m,mtext = SD.moment(nr=2,vari='xyt')
|
|
|
|
|
>>> np.round(m,3),mtext
|
|
|
|
|
(array([ 3.061, 0.132, -0. , 2.13 , 0.011, 0.008, 1.677, -0. ,
|
|
|
|
|
0.109, 0.109]), ['m0', 'mx', 'my', 'mt', 'mxx', 'myy', 'mtt', 'mxy', 'mxt', 'myt'])
|
|
|
|
|
(array([ 3.061, 0.132, 0. , 2.13 , 0.011, 0.008, 1.677, -0. ,
|
|
|
|
|
0.109, 0.109]), ['m0', 'mx', 'my', 'mt', 'mxx', 'myy', 'mtt', 'mxy', 'mxt', 'myt'])
|
|
|
|
|
|
|
|
|
|
References
|
|
|
|
|
----------
|
|
|
|
|