Design and implement prototype explore view

[nmaarnio]

The explore view is part of the wizard that facilitates EDA (exploratory data analysis). It should enable producing plots and to use some data analysis methods such as clustering and PCA. At the least the following plots are required:

• Scatterplot (vector data)
• Histogram (vector data and raster data)
• Line plot (vector data)
• Box plot (vector data)
• Parallel coordinates (vector data)
• PCA visualization (2D / 3D ROI (region of interest) type plot, scatterplot matrix etc.)

Plots that are needed only for validation do not need to be available here.