如何在matplotlib上仅将乳胶字体用于标题而不用于轴号

Question

really sorry for this, have been searching this since yesterday and I haven't seen a similar problem.

The figure is a bit large, so I only post some relevant part:

plt.rcParams.update({
    "text.usetex": True})



font = {'family': 'serif', 'serif': ['Computer Modern'],
        'weight' : 'bold',
        'size'   : 22}

matplotlib.rc('font', **font)

fig = plt.figure(figsize=(15,12))
# set height ratios for subplots
gs = gridspec.GridSpec(5,1, height_ratios=[1, 1, 1, 1, 1]) 

ax0 = plt.subplot(gs[0])


line0, = ax0.plot(xnew, uf_sm(xnew), color='r', linewidth=2.5)
plt.title("\\boldmath$u _\phi$",fontsize=30)
ax0.set_yticks([0.0, 0.3, 0.6])

now, with this font features, everything works properly except one thing: bold doesn't work, AND the axis numbers (next to ticks) are very faint, and don't appear good on the pdf.

I have seen that here is no bold option on latex, so is there a way I can either

1. use latex only on titles (so I can bold the numbers on axis)

OR

2. Keep using latex but somehow use a better font to have "stronger" axis numbers.

REALLY thank you for your time, hope its not that hard.

Using no latex in title, I can work with $$ but I get this u:

On the other hand, when using usetex= True I get this u:

which is actually what I want to have

Answer 1

How about this?

fig, ax = plt.subplots()
x = np.arange(5)
ax.scatter(x,x)
ax.set_title(r'$\sum \ \alpha \beta \gamma \ this \ is \ \frac{title}{in \ LaTeX} $')
ax.set_xlabel('xaxis label is not in latex')
ax.set_ylabel('yaxis label is not in latex as well')

output: