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以上腳本的出圖如下：
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我們可以把地圖的通用選項移到 ``basmap`` 中，因此以上指令也可以寫成這樣
We can move all the general settings to the ``basemap`` command, and the script becomes to
gmt basemap -R-1/23/0/7 -JX15c/10c -Baf
gmt plot $zzh -Sc0.35c -G#58C73A -W0.03c,black
gmt plot $suao -Sd0.35c -G#3A6BC7 -W0.03c,black
gmt basemap -R-1/23/0/7 -JX15c/10c -Baf
gmt plot $zzh -Sc0.35c -G#58C73A -W0.03c,black
gmt plot $suao -Sd0.35c -G#3A6BC7 -W0.03c,black
如此一來，兩行 ``plot`` 指令各自的功用就一目了然：它們只是處理並繪製不同的資料點，但繪製的方法是相同的。你可以把所有選項與語法格式都互相對齊以求美觀，而所有通用的設定，包括 ``-R``、``-J``、``-B`` 等，全部都丟到 ``basemap`` 就對了。
Now it makes more sense to these two lines of ``plot`` commands: they read and plot data points in the same way, but using different markers and colors. You can also align all the options to make your script prettier. Remember: just toss all general options, like ``-R``, ``-J``, ``-B``, to the ``basemap`` command, and you are all set.
現在腳本的第一個指令是以 ``basemap`` 開頭。當然，我們可以在這個指令中一併設定標題與座標軸標籤。在「\ :doc:`making_first_map`\ 」中，我們有提到標題可以使用 ``-B+t`` 添加，而在「\ :doc:`editing_cpt_colorbar`\ 」中，我們也提到了要使用 ``-B[x或y]+l`` 添加座標軸的標籤。因此，我們就來添加一些文字說明吧：
Now the script begins with a ``basemap`` option. We can set up the title and the axis label in this line as well. In :doc:`making_first_map`, we learned how to add a title using ``-B+t``; and in :doc:`editing_cpt_colorbar`, we also mentioned that the axis label is governed by ``-B[x_or_y]+l``. Follow these instructions and add some text in the map:
# ==== 設定變數 ====
zzh='zzh.txt'
suao='suao.txt'
zzh_style="-Sc0.35c -G#58C73A -W0.03c,black"
suao_style="-Sd0.35c -G#3A6BC7 -W0.03c,black"

gmt begin windspeed_vs_temperature png
# ==== 版面與作圖區設定 ====
# -Baf 現在拆成了 -Bxaf 與 -Bya2f，
# 你可以分開給定 x 軸與 y 軸的 a、f、g 選項！
gmt basemap -R-1/23/0/7 -JX15c/10c -B+t"January 2016" \
-Bxaf+l"Temperature (degree C)" -Bya2f+l"Wind Speed (m s-1)"
# ==== 繪點 ====
gmt plot $zzh $zzh_style
gmt plot $suao $suao_style

# ==== 灰色垂直虛線 ====
gmt plot -W0.03c,100,-- << LINEEND
0 0
0 7
LINEEND

gmt end
# ==== Setting variables ====
zzh='zzh.txt'
suao='suao.txt'
zzh_style="-Sc0.35c -G#58C73A -W0.03c,black"
suao_style="-Sd0.35c -G#3A6BC7 -W0.03c,black"

gmt begin windspeed_vs_temperature png
# ==== Settings about the map ====
# -Baf now becomes -Bxaf and -Bya2f
# and you can specify a, f, and g options for x and y axes separately!
gmt basemap -R-1/23/0/7 -JX15c/10c -B+t"January 2016" \
-Bxaf+l"Temperature (degree C)" -Bya2f+l"Wind Speed (m s-1)"
# ==== Scatter plot ====
gmt plot $zzh $zzh_style
gmt plot $suao $suao_style

# ==== Gray vertical line ====
gmt plot -W0.03c,100,-- << LINEEND
0 0
0 7
LINEEND

gmt end
以上腳本的出圖如下：
Here's the output figure:
嗯，座標軸標籤會同時出現在上下及左右兩邊，看起來有點多餘；另外，縱軸的單位 ``m s-1`` (公尺/秒) 的 ``-1`` 應該要上標，才是正確的寫法。除此之外，如果 ``degree C`` 能夠直接表示成 ``°C`` 的話，更顯得簡潔有力。要做到以上修改並不困難，首先，我們可以使用 ``-BWSne`` 選項讓左邊和下方顯現座標軸和其標籤，而右邊和上方只顯示座標軸。如果要在文字中顯示上下標，需要加上 **GMT 專用的控制字元** ``@``。``@+`` 是上標，``@-`` 則是下標。被上下標控制字元包起來的字就會顯示為上下標。因此，我們只要把 ``m s-1`` 改成 ``m s@+-1@+`` 即可。攝氏度數的符號也可以使用此控制字元來顯示，代號是 ``@.``。
Hmm, now the axis labels appear at all sides, which is a bit redundant. And the unit of the vertical axis ``m s-1`` (m/s) is not correct writing; the ``-1`` here should be superscripted. In addition, if we can rewrite ``degree C`` as ``°C``, it would be more clear to read. It's not hard to make these changes. First, we can use the ``-BWSne`` option to make axis ticks and labels appear at the west and the south side. Only the axis lines would show up at the east and the north side. If you want to superscript/subscript characters, you need to use the **GMT control character** ``@``. ``@+`` is to toggle superscription on/off, and ``@-`` is to toggle subscription on/off. Any letters enclosed by the control characters will be superscripted/subscripted. Therefore, we can change ``m s-1`` to ``m s@+-1@+`` to achieve our goal. The degree symbol is also available using the control character -- it's ``@.``.
嚴格說來，``@+`` 控制的是上標的開啟與關閉，因此 ``m s@+-1`` 其實就能使 ``-1`` 上標。然而，筆者建議還是養成良好習慣，頭跟尾都加上控制字元，不只易於判讀跟修改，也跟 `LaTeX <https://zh.wikipedia.org/wiki/LaTeX>`_ 的語法概念類似。有關控制字元可操作的其他字串設定，請參考 `GMT Cookbook <https://docs.generic-mapping-tools.org/latest/cookbook/features.html#character-escape-sequences>`_。
Strictly speaking, ``@+`` toggles the superscription on/off so that ``m s@+-1`` would suffice for our need. However, I still suggest to add the control characters at both ends so that it's easier to read and edit. This style also resembles the `LaTeX <https://en.wikipedia.org/wiki/LaTeX>`_ writing guide. For other details regarding what the GMT control character can do, please see the `GMT Cookbook <https://docs.generic-mapping-tools.org/latest/cookbook/features.html#character-escape-sequences>`_.
把以上更動整理到腳本中，「版面與作圖區設定」的部份就會變成這樣：
Let's modify our script based on the changes above and the "Settings about the map" section will become this:
# ==== 版面與作圖區設定 ====
gmt basemap -R-1/23/0/7 -JX15c/10c -BWSne+t"January 2016" -Bxaf+l"Temperature (@.C)" -Bya2f+l"Wind Speed (m s@+-1@+)"
# ==== Settings about the map ====
gmt basemap -R-1/23/0/7 -JX15c/10c -BWSne+t"January 2016" -Bxaf+l"Temperature (@.C)" -Bya2f+l"Wind Speed (m s@+-1@+)"
修改後的座標軸看起來就清爽多了！
Now, these axes look much better!

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  1. GMT Tutorials
  2. scatter plot
  3. English (United States)
以上腳本的出圖如下：
Here's the output figure:
a year ago
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Source string location
../../SOURCE_DOCS/scatter_plot.rst:268
String age
a year ago
Last updated
12 months ago
Source string age
3 years ago
Translation file
docs/locale/en_US/LC_MESSAGES/main/scatter_plot.po, string 70