r - Plotting a graph with multiple columns -

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i have data set 20 years in first column (1990,1991,etc..) , each of next 5 columns different state (ca,co,pa,ny,tx). trying create plot year along x-axis, , totals each state along y-axis, each state being represented on plot different color line.

i can fine using matplot:

matplot(population$year,popamount,type="l")

where popamount variable containing 5 state columns. using matplot code above, can achieve looking for.

i wondering how using plot() though, because whenever try same code using plot(), receive error:

error in xy.coords(x, y, xlabel, ylabel, log) :    'x' , 'y' lengths differ

my population$year variable 20 years, , popamount has data each of 20 years. here snippet of data:

year    ca   co   pa   ny   tx 1990    1234 1234 1234 1234 1234 1991    5678 5678 5678 5678 5678 1992    9876 9876 9876 9876 9876

why able in matplot not plot?


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