The Use of Biplots to Evaluate Spatial Effects of Weather Modification
AbstractWeather modification effects are likely to be spread unevenly over an area rather than have equal effects everywhere. This paper describes graphical techniques for exploring such variable effects. They display the slopes of the effects’ variations over the area. Such slopes may be obtained by regression and displayed on a map, or by principal component analysis and displayed with respect to the principal coordinates of the stations at which the effects were observed. Both these displays are biplots and the differences between the two may reveal special features of the effect variability over the area.
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