f:=(t,y)->exp(t)*sin(y);

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Euler:=proc(ystart,tstart,tstop,deltat) local t,y0,y1; global results; t:=tstart; y0:=ystart; results:=[[tstart,ystart]]; while t < tstop do y1:=evalf(y0+f(t,y0)*deltat); t:=evalf(t+deltat); results:=[op(results),op([[t,y1]])]; y0:=y1; end do; end proc;

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Euler(3,0,5,0.2);

NiMkIStyJnpWNCYhIik=

results;

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result1:=results;

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with(plots);

Warning, the name changecoords has been redefined

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pointplot(result1,style=LINE);

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plot2:=results;

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display({plot1,plot2});

Error, (in display) first argument must be a plot structure or list, set or array of plot structures

?display?pointplot