# Exporting results for visualisation

We now turn to the exporter facility of Feel++ which allows to provide the results of Feel++ solves in a format readable by ParaView or EnSight.

In this 2D and 3D example, we

• initiate the Feel++ environment

• build the mesh and partition it

• build a function space $X_h$

• create an element $u$ of $X_h$ which interpolate an expression givn by the end-user

• export to the Ensight Gold format (the default Feel++ format) of Feel++

Example to build a mesh and function space, create an element and visualize them in ParaView
``````import feelpp
import sys
app = feelpp.Environment(["myapp"],config=feelpp.localRepository("")) (1)``````
 1 The Feel++ environment is initiated with the name of the application and the path to the local repository where the results will be stored.
``````app.setLogVerbosityLevel(0) (1)
mesh = feelpp.load(feelpp.mesh(dim=2,realdim=2), name=geofilename, h=0.1, verbose=1) (2)
Xh=feelpp.functionSpace(mesh=mesh,space="Pch",order=1) (3)
P0h=feelpp.functionSpace(mesh=mesh,space="Pdh",order=0) (4)
u=Xh.element() (5)
u.on(range=feelpp.elements(mesh), expr=feelpp.expr("sin(2*pi*x)*cos(pi*y):x:y")) (6)
e = feelpp.exporter(mesh=mesh)  (7)
e.save()   (11)``````
 1 The verbosity level is set to 0 (only `VLOG(level)` with `level ⇐ 0` are displayed) 2 The mesh is loaded from the github.com/feelpp/feelpp/ repository 3 The function space $X_h$ is built from the mesh `mesh` and the space `Pch` and order `1` 4 The function space $P0_h$ is built from the mesh `mesh` and the space `Pdh` and order `0` 5 The element `u` is built from the function space `Xh` 6 The element `u` is interpolated with the expression `{sin(2*pi*x)*cos(pi*y)}:x:y` 7 The exporter is built from the mesh `mesh` 8 The scalar `a_scalar` is added to the exporter `e` 9 The element `u` is added to the exporter `e` 10 The element `pid` is added to the exporter `e` 11 The exporter `e` is saved to the disk
Results
```[loadMesh] Loading mesh in format geo+msh: "/Users/prudhomm/Downloads/feelppdb/downloads/feelpp2d.geo"
The results are stored in the directory `feelppdb` and can be visualized with ParaView or EnSight.
INFO: The file `exports/ensightgold/myapp/myapp.case` can be opened directly in ParaView or EnSight to visualize the mesh and the fields.
``!ls exports/ensightgold/myapp``
```myapp-1.sos          myapp.geo.0001       myapp.u.scl.0001