plot from two vectors not working "not enough arguments"

fima v

2017 8 29

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i have a 3D array called 'arr' which was created from parsing a text table i wnat to plot a single 2D cell from it. when i try to do the following i get an error "Error using plot Not enough input arguments."

why its happening?

Thanks

    phase=arr{1}{1};
amp=arr{1}{2};
plot(phase,amp);

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fima v 2017-8-29

those variable have integers in them. first vector contains its a simple plot , why it says , not enough arguments.

-90 -87 -84 -81 -78 -75 -72 -69 -66 -63 -60 -57 -54 -51 -48

the second vector contains

-4.42360000000000 -4.89380000000000 -6.06030000000000 -6.97660000000000 -8.34980000000000 -8.95580000000000 -9.86160000000000 -11.4061000000000 -12.8650000000000 -14.1379000000000 -15.5264000000000 -17.2791000000000 -19.8537000000000 -24.0548000000000 -30.6594000000000