I am using matplotlib to plot a 2D array but in the plot I am not getting curves, it only shows the axis. Following is my code:
posx = []
posy = []
for i in range(1,37):
posx.append(data[i,0])
posy.append(data[i,1])
for j in range(2,507):
plt.plot(data[0,j],data[i,j])
print(posx,posy)
plt.show()
I have tried plt.plot(data[0,j],data[i,j],'.') which shows me a scatter plot which I don't want.
In your call to plot - plt.plot(data[0,j],data[i,j]), data[0,j] and data[i,j] are single numbers. plt.plot() tries to plot a line, however you are only passing a single x and a single y value. In order plot a line, you need at least 2 values for the x and y.
Your code can be simplified using slice notation which will remove the inner for loop:
for i in range(1,37):
plt.plot(data[0, 2:507], data[i, 2:507])
plt.show()