[Tex/LaTex] How to set the subfigures centered using Pylatex

pylatexpythonsubfloats

I have been using Pylatex package in Python to generate reports in pdf format, but I got a problem in how to set the position of subpictures at a report without to use the full size width of page (using small subpictures centered).
Any guess about?

I try to use "placement='c'" and nothing…

# the picture to plot
[![kitten][1]][1]

# my code 
import os

from pylatex import Document, PageStyle, NewPage, SubFigure, Figure, Section
from pylatex.utils import NoEscape

def generate_pdf_report(imageFilename):
    geometry_options = { "head": "30pt",
                     "margin": "0.3in",
                     "top": "0.2in",
                     "bottom": "0.4in",
                     "includeheadfoot": True}

    doc = Document(geometry_options=geometry_options)
    first_page = PageStyle("firstpage")
    doc.preamble.append(first_page)
    doc.change_document_style("firstpage")

    with doc.create(Section('Plotting multiple figures')):
        doc.append("How to set the pictures at center of page without change the width?")

        with doc.create(Figure(position='h!')) as imagesRow1:
            with doc.create(
                SubFigure(position='c',  width=NoEscape(r'0.33\linewidth'))) as left_imagesRow1:
                left_imagesRow1.add_image(imageFilename,placement='c', width=NoEscape(r'0.95\linewidth'))
                left_imagesRow1.add_caption("img 1")

            with doc.create(
                SubFigure(position='c', width=NoEscape(r'0.33\linewidth'))) as right_imagesRow1:
                right_imagesRow1.add_image(imageFilename,placement='c', width=NoEscape(r'0.95\linewidth'))
                right_imagesRow1.add_caption("img 2")

        with doc.create(Figure(position='h!')) as imagesRow2:
            with doc.create(
                SubFigure(position='c',  width=NoEscape(r'0.33\linewidth'))) as left_imagesRow2:
                left_imagesRow2.add_image(imageFilename,placement='c', width=NoEscape(r'0.95\linewidth'))
                left_imagesRow2.add_caption("img 3")

            with doc.create(
                SubFigure(position='c', width=NoEscape(r'0.33\linewidth'))) as right_imagesRow2:
                right_imagesRow2.add_image(imageFilename, placement='c', width=NoEscape(r'0.95\linewidth'))
                right_imagesRow2.add_caption("img 4")

        imagesRow2.add_caption("Setting the subpictures at center")

    doc.append(NewPage())


    doc.generate_pdf("test_image_positions", compiler="pdflatex", clean=True, clean_tex=False)

imageFilename = os.path.join(os.getcwd(),"kitten.jpg")

generate_pdf_report( imageFilename)

The result is the subpictures on the left side of document.

Best Answer

The position for a subfigure is not related to horizontal positioning, but vertical positioning. It determines how the subfigure is placed on the baseline.

What you should do instead is to import Command from pylatex, and then add

doc.append(Command('centering'))

at the start of each figure.

In addition you should remove placement='c' from the image inclusion, which doesn't do anything, except adding a c to your document.

# the picture to plot
# [![kitten][1]][1]

# my code 
import os

from pylatex import Document, PageStyle, NewPage, SubFigure, Figure, Section, Command
from pylatex.utils import NoEscape

def generate_pdf_report(imageFilename):
    geometry_options = { "head": "30pt",
                     "margin": "0.3in",
                     "top": "0.2in",
                     "bottom": "0.4in",
                     "includeheadfoot": True}

    doc = Document(geometry_options=geometry_options)
    first_page = PageStyle("firstpage")
    doc.preamble.append(first_page)
    doc.change_document_style("firstpage")

    with doc.create(Section('Plotting multiple figures')):
        doc.append("How to set the pictures at center of page without change the width?")

        with doc.create(Figure(position='h!')) as imagesRow1:
            doc.append(Command('centering'))
            with doc.create(
                SubFigure(position='c',  width=NoEscape(r'0.33\linewidth'))) as left_imagesRow1:
                left_imagesRow1.add_image(imageFilename, width=NoEscape(r'0.95\linewidth'))
                left_imagesRow1.add_caption("img 1")

            with doc.create(
                SubFigure(position='c', width=NoEscape(r'0.33\linewidth'))) as right_imagesRow1:
                right_imagesRow1.add_image(imageFilename, width=NoEscape(r'0.95\linewidth'))
                right_imagesRow1.add_caption("img 2")

        with doc.create(Figure(position='h!')) as imagesRow2:
            doc.append(Command('centering'))
            with doc.create(
                SubFigure(position='c',  width=NoEscape(r'0.33\linewidth'))) as left_imagesRow2:
                left_imagesRow2.add_image(imageFilename, width=NoEscape(r'0.95\linewidth'))
                left_imagesRow2.add_caption("img 3")

            with doc.create(
                SubFigure(position='c', width=NoEscape(r'0.33\linewidth'))) as right_imagesRow2:
                right_imagesRow2.add_image(imageFilename,  width=NoEscape(r'0.95\linewidth'))
                right_imagesRow2.add_caption("img 4")

        imagesRow2.add_caption("Setting the subpictures at center")

    doc.append(NewPage())


    doc.generate_pdf("test_image_positions", compiler="pdflatex", clean=True, clean_tex=False)

imageFilename = os.path.join(os.getcwd(),"out-inc.pdf")

generate_pdf_report( imageFilename)

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(Note: I've never heard of pylatex before, so this answer is just based on looking at the example in the documentation.)

Depends on what you need, and how you want to print it. The simplest case would be to just print the values in the DataFrame as a matrix. Or you could just build a table.

The example below generates this:

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python,pylatex – How to Create Barcodes Using PyLaTeX Library in Python

The python code you included doesn't seem to produce the expected output, perhaps it is just my settings or I have not used it correctly. Regardless, please see this code which implements the makebarcode package and prints a barcode:

# -*- coding: utf-8 -*-

from pylatex import Document, Command, Package, MiniPage, TextBlock, MediumText, HorizontalSpace, VerticalSpace
from pylatex.utils import bold

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    paper_size = "b5paper"
    geometry_options = {"paper": paper_size, "top": "1.5cm", "bottom": "1.5cm"}

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       with page.create(TextBlock(100, 150, 40)):
          page.append("Test")

       with page.create(TextBlock(80, 150, 0)):
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This produces this broken output, I am not sure why but the code you included is not compiling properly:

I am sure you can debug why it is not working, I do not know and cannot profess to great knowledge of python, pylatex or latex as I am still learning! It produces your barcode though, you can change the string (ZDENEK WAGNER in this case which was the one from the makebarcode package documentation) to something random, I am sure this is trivial in python to create random or pseudorandom strings.

Change the package options (makebarcode_options has been set according to the makebarcode package documentation on page 2, have a look and change as needed) and or package in the places I have commented using the ctan link that Willie Wong posted in the comments if you wish. Hope this helps!

Best Answer

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