source("http://macosa.dima.unige.it/r.R") # If I have not already loaded the library ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- # We can also trace the direction field of the solutions of an indefinite integral. # See here for explanations. # f1 = function(x) 1+x; f2 = function(x) 3^x; f3 = function(x) 1.5^x f4 = function(x) 1/x; f5 = function(x) x^2; f6 = function(x) x BF=1.8; HF=1.8 boxww(-3,2, -2,3); Dy = function(x,y) f1(x); diredif(-3,2,-2,3, 15,15) GridHC(0,"blue"); GridVC(0,"blue"); underX("-3",-3); underX("2",2); underX("0",0); underY("-2",-2); underY("3",3); underY("0",0) boxww(-3,2, -2,3); Dy = function(x,y) f2(x); diredif(-3,2,-2,3, 15,15) GridHC(0,"blue"); GridVC(0,"blue"); underX("-3",-3); underX("2",2); underX("0",0); underY("-2",-2); underY("3",3); underY("0",0) boxww(-3,2, -2,3); Dy = function(x,y) f3(x); diredif(-3,2,-2,3, 15,15) GridHC(0,"blue"); GridVC(0,"blue"); underX("-3",-3); underX("2",2); underX("0",0); underY("-2",-2); underY("3",3); underY("0",0) boxww(-3,2, -2,3); Dy = function(x,y) f4(x); diredif(-3,2,-2,3, 15,15) GridHC(0,"blue"); GridVC(0,"blue"); underX("-3",-3); underX("2",2); underX("0",0); underY("-2",-2); underY("3",3); underY("0",0) boxww(-3,2, -2,3); Dy = function(x,y) f5(x); diredif(-3,2,-2,3, 15,15) GridHC(0,"blue"); GridVC(0,"blue"); underX("-3",-3); underX("2",2); underX("0",0); underY("-2",-2); underY("3",3); underY("0",0) boxww(-3,2, -2,3); Dy = function(x,y) f6(x); diredif(-3,2,-2,3, 15,15) GridHC(0,"blue"); GridVC(0,"blue"); underX("-3",-3); underX("2",2); underX("0",0); underY("-2",-2); underY("3",3); underY("0",0) Other examples of use