Error: Numbers of rows must match (1 != 2)

[Daniel Rossell]

I keep getting an error when I try to do a simple XY plot, here is the complete output :

 

octave-3.2.4.exe:4> x1 = csvread("c:\\data\\temporalHour_dataX.dat");
octave-3.2.4.exe:5> y1 = csvread("c:\\data\\temporalHour_dataY.dat");
octave-3.2.4.exe:7> length(x1)
ans =  5250
octave-3.2.4.exe:8> length(y1)
ans =  5250
octave-3.2.4.exe:9> plot(x1,y1,'+');
error: number of rows must match (1 != 2) near line 519, column 33
error: called from:
error:   C:\Octave\3.2.4_gcc-4.4.0\share\octave\3.2.4\m\plot\__go_draw_axes__.m
at line 519, column 24
error:   C:\Octave\3.2.4_gcc-4.4.0\share\octave\3.2.4\m\plot\__go_draw_figure__.
m at line 92, column 3
error:   C:\Octave\3.2.4_gcc-4.4.0\share\octave\3.2.4\m\plot\gnuplot_drawnow.m a
t line 99, column 5
octave-3.2.4.exe:10>

 

The data reads in from the csv with no problem, and both x1 and y1 are the same length, so why do I get this error?