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Replot after data input from stdin also fails. Why is this happens. plot '-' w l 0 0 5 0 e replot sin(x) ^ unexpected or unrecognized token

The data input from stdin fails for the second time as follows, how can I solve this problem? plot '-' w l 0 0 5 0 e replot '-' w l ^ unexpected or unrecognized token The following code works, so I thought it's not grammatical error. Is this some kind of bug ? plot sin(x) replot '-' w l 0 0 5 0 e I know plot '-' w l, '-' w l. But I don't have all data to plot in advance. So I can't use this method. I want to plot incrementally. Thanks.

The data input from stdin fails for the second time as follows, how can I solve this problem? plot '-' w l lw 1 0 0 5 0 e replot '-' w l lw 1 ^ unexpected or unrecognized token The following code works, so I thought it's not grammatical error. Is this some kind of bug ? plot sin(x) replot '-' w l lw 1 0 0 5 0 e I know plot '-' w l, '-' w l. But I don't have all data to plot in advance. So I can't use this method. I want to plot incrementally. Thanks.