pyva.data.matrixClasses.ShapeSignal

class pyva.data.matrixClasses.ShapeSignal(mesh, xdata, ydata, dof)

Bases: Signal

Class for Signals with link to shapes ydata can be reprented by ndarrays but also function definition

xdata

x-axis samples @type DataAxis

ydata

array of Signal samples with dimension Ndof x Nxdata @type np.array or function with ndarray output of (Ndofs,Nxdata(]) output dof: DOF object with ID, local DOF and type of ydata channels

__init__(mesh, xdata, ydata, dof)

constructor for Signal classes with link to 2D meshes

Parameters:

  • mesh (meshtypes) – mesh that links the DOFs to positions

  • xdata (DataAxis) – in depth data of Signals e.g. time, frequency

  • ydata (ndarray of size (Ndof,Nxdata) or function with input arguments (pos_x<,posy,posz,>,xdata) depending on mesh position arguments) – DESCRIPTION.

  • dof (TYPE, optional) – DESCRIPTION. The default is dof.DOF(0,0,dof.DOFtype(typeID = 0)).

Raises:

ValueError – input is checked for consistency.

Return type:

None.

Methods

__init__(mesh, xdata, ydata, dof)

constructor for Signal classes with link to 2D meshes

conj()

getdof()

imag()

inf2zero()

sets all infs to zero

interp(xvalues[, ix])

interpolation for Signals

isa(typestr)

nan2zero()

sets all 'NaN's to zero

plot(nfig[, loc, res, xscale, yscale])

Plot method for Signal obejcts.

plot3d([fig, index])

pressure(ID)

Exctracts the pressure from Signals

real()

setdof(value)

sum()

sum of Signals

transfer(other[, IDs])

Calculates the transfer function of similar types between differnt DOFs

volume_flow(ID[, dofarg, S])

Exctracts the volume flow from Signals

Attributes

Nsig

Number of Signal channels

Nxdata

Number of DataAxis samples

dof

xdata

ydata

property Nsig

Number of Signal channels

Returns:

Number of Signal DOFs.

Return type:

int

property Nxdata

Number of DataAxis samples

Returns:

Number of samples.

Return type:

int

inf2zero()

sets all infs to zero

Returns:

with inf’s replaced by 0.

Return type:

Signal

interp(xvalues, ix=0)

interpolation for Signals

Provides interpolated values when sample is not given

Parameters:

  • xvalues (double) – xvalues for interpolation from Signal

  • ix (integer, optional) – Signal index. The default is 0.

Returns:

interpolated ydata values for Signal of index ix

Return type:

ndarray

nan2zero()

sets all ‘NaN’s to zero

Returns:

with NaNs replaced by 0.

Return type:

Signal

plot(nfig, loc=1, res='mag', xscale='linear', yscale='linear', **kwargs)

Plot method for Signal obejcts.

Parameters:

  • nfig (TYPE) – number of figure.

  • loc (int or str, optional) – location of legend. The default is 1.

  • res (str, optional) – kind of result mag, phase, real, imag. The default is ‘mag’.

  • xscale (str, optional) – linear or log. The default is ‘linear’.

  • yscale (str, optional) –

    linear or log. The default is ‘linear’.

    ls : line style

  • **kwargs – Arbitrary argument list.

  • ID (IDs to plot) –

  • dof (DOFs to plot e.g. [1,2]) –

  • legstr (additional label added to automatic label) –

  • fulllegstr (list of labels overwriting the automatic label) –

  • DX (int) – value for skipping x samples DX=2 skips every second sample

  • lw (list or tuple) – line width

  • cs (list or tuple) – colorstyle

  • ms (list or tuple) – markerstyle

  • ls (list or tuple) – line_styles

Raises:

ValueError – DESCRIPTION.

Return type:

None.

pressure(ID)

Exctracts the pressure from Signals

Parameters:

ID (int) – node ID.

Returns:

extracted pressure Signal.

Return type:

Signal

sum()

sum of Signals

For reasonable results DOFtype must not change

Returns:

sum of all DOFs per x-axis.

Return type:

Signal

transfer(other, IDs=None)

Calculates the transfer function of similar types between differnt DOFs

Parameters:

  • other (Signal) – input Signal.

  • IDs (tuple or list of int, optional) – output and input ID. The default is [0,1].

Raises:

ValueError – IN case of not consitent data.

Returns:

transfer coefficient, self/other.

Return type:

Signal

volume_flow(ID, dofarg=1, S=1.0)

Exctracts the volume flow from Signals

Parameters:

  • ID (int) – node ID.

  • dofarg (int, optional) – local degree of freedom. The default is 1.

  • S (float, optional) – DESCRIPTION. The default is 1..

Raises:

ValueError – DESCRIPTION.

Returns:

of volume flow DOFs.

Return type:

Signal