How to plot sin(x) + sin(y) = 1 in gnuplot?

I am trying to plot the parametric function sin(x) + sin(y) = 1, but I'm not quite there yet. Here's my script:

set parametric set urange [-10:10] set vrange [-10:10] set sample 2000 set size ratio -1 set grid front unset border splot sin(u) + sin(v) = 1 

But I get the error: line 10: parametric function not fully specified. What should I do? I want my function plotted as Desmos does it, in the Cartesian coordinate system:

Thank you for your suggestions in advance.

1 Answer

sin(x) + sin(y) = 1 is not a parametric equation but an implicit equation. Either you need to do some maths and find a corresponding parametric equation, or you need to resort to a 'trick' which is the one you've probably used in Desmos: gnuplot can plot isolines of functions, so you can plot the isoline 1 of f(x,y)=sin(x) + sin(y).

set cntrparam levels discrete 1 set contour set view map unset surface set isosample 100 splot sin(x)+sin(y)