Hi. I have a scatter of three coordinates:
%scattered values (y1...4 are numbers between 0 & 1, x1...4 are numbers between 0 & 100)
yVect = [y1, y2, y3, y4];xVect = [x1, x2, x3];%scatter plot & trendline
plot = figure;ST_533 = axes('Parent',plot);hold(ST_533,'all');scatter(xVect,yVect,'filled');ylim([0 1]);Poly = polyfit(xVect,yVect,1);x = linspace(0,100,5000);Trend = polyval(Poly,x);hold onplot(x,Trend);
Now I need to find the y-value at which the trendline passes through the y-axes (so when x equals zero). Any Idea how I can do this? I've been searching for quite a while and couldn't find anything so far. Thanks!
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