Annotate value of a variable with ax.annotate?

Community matplotlib-users
1

Hello,

I am trying to print in the plot the value of a time variable which I
obtain like this

Time = MBH_inst[0] # Column 1

This should be placed on the top right part of the plot showing the current time

Time = XXX yrs

But I do not know how to pass this to ax.annotate:

ax.annotate('Time = ', size=18, xy=(3, 1), xycoords='data',
            xytext=(0.8, 0.95), textcoords='axes fraction',
            horizontalalignment='right', verticalalignment='top',
            )

Thanks,

Pau

2

You could use Python string formatting, like so:

ax.annotate('Time = %s' % Time, size=18, xy=(3, 1), xycoords='data',
             xytext=(0.8, 0.95), textcoords='axes fraction',
             horizontalalignment='right', verticalalignment='top',
             )

···

On 04/29/2011 06:54 AM, Pau wrote:

Hello,

I am trying to print in the plot the value of a time variable which I
obtain like this

Time = MBH_inst[0] # Column 1

This should be placed on the top right part of the plot showing the current time

Time = XXX yrs

But I do not know how to pass this to ax.annotate:

ax.annotate('Time = ', size=18, xy=(3, 1), xycoords='data',
             xytext=(0.8, 0.95), textcoords='axes fraction',
             horizontalalignment='right', verticalalignment='top',
             )

Thanks,

Pau

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Michael Droettboom
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3

Hi,

Pau <vim.unix@...982...>

Hello,

I am trying to print in the plot the value of a time variable which I
obtain like this

Time = MBH_inst[0] # Column 1

This should be placed on the top right part of the plot showing the current
time

Time = XXX yrs

But I do not know how to pass this to ax.annotate:

ax.annotate('Time = ', size=18, xy=(3, 1), xycoords='data',
            xytext=(0.8, 0.95), textcoords='axes fraction',
            horizontalalignment='right', verticalalignment='top',
            )

Maybe like this:

ax.annotate('Time = %f'%(MBH_inst[0],), size=18, xy=(3, 1), xycoords='data',
            xytext=(0.8, 0.95), textcoords='axes fraction',
            horizontalalignment='right', verticalalignment='top',
            )
?

You can also adjust the number of shown digits right of the comma by setting
it up like this: %0.2f etc.

Just look it up in the python documentation (search hints: python string
format).

Wish you the best,

Malte