Matplotlib string xticks

Question

def plot_freq_error(diff,file,possible_frequency):
    for foo in range(0, len(diff)):
        x = [diff[foo]]
        name = comp
        color = ['0.1', '0.2', '0.3','0.4','0.5','0.6','0.7','0.8', '0.9','0.95','1.0']
        label = ['0.8GHz','1.0GHz','1.2GHz','1.4GHz','1.6GHz','1.8GHz','2.0GHz','2.2GHz','2.4GHz']
        y = zip(*x)
        pos = np.arange(len(x))
        width = 1. / (1 + len(x))

        fig,ax = plt.subplots()
        matplotlib.rcParams.update({'font.size': 22})
        for idx, (serie, color,label) in enumerate(zip(y, color,label)):
            ax.bar(pos + idx * width, serie, width, color=color,label=label)

        plt.tick_params(\
            axis='x',          # changes apply to the x-axis
            which='both',      # both major and minor ticks are affected
            bottom='off',      # ticks along the bottom edge are off
            top='off',         # ticks along the top edge are off
            labelbottom='off') # labels along the bottom edge are off
        plt.tick_params(axis='both', which='major', labelsize=10)
        plt.tick_params(axis='both', which='minor', labelsize=8)
        plt.ylabel(name[foo],fontsize=40)
        #ax.legend(prop={'size':5})
        plt.xticks(label)
        plt.gray()
        plt.show()
        plt.clf()

With the code I wrote above I am unable to plot the xticks as string/floating point value for each bar. what am I doing wrong?

you need to use [`set_xticklabels`](http://matplotlib.org/api/axes_api.html#matplotlib.axes.Axes.set_xticklabels) — behzad.nouri, Oct 16 '14 at 10:32
I did try `ax.set_xticklabels(label)` but that does not seem to work. — user3808088, Oct 16 '14 at 10:36
instead of "that does not seem to work", you need to show error message you have got — behzad.nouri, Oct 16 '14 at 10:37
well, it seems that you are setting them `off`, in `bottom='off', top='off', ...` — behzad.nouri, Oct 16 '14 at 10:43
The ticks are not aligned according to the wdith of the column. I will fix that. — user3808088, Oct 16 '14 at 10:48

score 8 · Answer 1 · answered Apr 17 '17 at 21:43

ax.set_xticklabels(label) should actually work. What you are missing is to establish the x-ticks with theax.set_xticks(float) command

Here's an example:

x = np.arange(2,10,2)
y = x.copy()
x_ticks_labels = ['jan','feb','mar','apr','may']

fig, ax = plt.subplots(1,1) 
ax.plot(x,y)

# Set number of ticks for x-axis
ax.set_xticks(x)
# Set ticks labels for x-axis
ax.set_xticklabels(x_ticks_labels, rotation='vertical', fontsize=18)

Matplotlib string xticks

1 Answers1