how to insert trendlines in scatterplot matrix
<p>I have made a scatterplot matrix and whish to ad trend lines to each of the plots or just to those of significans.
my R command:
cor(K4Full[,c(6:9,22:25)])
plot(K4Full[,c(6:8,22:25)])</p>

<p><img src="https://i.stack.imgur.com/BWjVl.jpg" alt="Scatterplot matrix"></p>