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Nature 期刊图复现 | Python 实现主成分分析(PCA)图

  • 2026-06-30 22:21:38
Nature 期刊图复现 | Python 实现主成分分析(PCA)图

来源论文

论文地址:

https://www.nature.com/articles/s41586-025-09709-1

论文题目:

Lymph node environment drives FSP1 targetability in metastasizing melanoma

原图释(英):a, Principal component analysis (PCA) of metabolomic profiles from the B16-F0 (parental) and LN1, 7–9 lines.

原图释(中):a, 对B16-F0(亲本)和LN1的代谢组谱进行主成分分析(PCA),7–9条。b,LN7–9中代谢产物的前25种差异显著,与LN1和亲本系相比。

复现图片

配色方案

color_schemes = {    1: { # 经典 Nature/Science 风格:高对比度清爽自然色系        'fill': ['#6d6d6d''#e6a3d8''#79d2a6''#79d2a6''#79d2a6'],        'edge': ['#1a1a1a''#b359a3''#40bf80''#009966''#004d33']    },    2: { # 经典 Cell 科学出版物风格:明亮饱和的细胞生物学常用色        'fill': ['#4d4d4d''#f0a3a3''#9ce6b8''#9ce6b8''#9ce6b8'],        'edge': ['#000000''#cc3333''#2eb866''#1f7a44''#103d22']    },    3: { # Lancet 柳叶刀风格:沉稳庄重的深红与冷绿学术色调        'fill': ['#5e5e5e''#e6b8b8''#99ccd6''#99ccd6''#99ccd6'],        'edge': ['#1a1a1a''#b33636''#338594''#20535c''#0d2124']    },    4: { # JCO 临床肿瘤学风格:经典的温和学术蓝绿渐变配灰        'fill': ['#737373''#adcbe3''#c8e6c9''#c8e6c9''#c8e6c9'],        'edge': ['#262626''#4f81bd''#4caf50''#2e7d32''#1b5e20']    },    5: { # PNAS 现代中性风格:兼顾色盲友好的学术低饱和配色        'fill': ['#666666''#f3ca97''#a6cbe3''#a6cbe3''#a6cbe3'],        'edge': ['#1f1f1f''#e69f00''#56b4e9''#0072b2''#003c5c']    },    6: { # 优雅柔和冰岛风格:低调高雅的低饱和度莫兰迪色系        'fill': ['#7f8c8d''#d9b3d2''#a3c2c2''#a3c2c2''#a3c2c2'],        'edge': ['#2c3e50''#a66a9c''#5c8a8a''#3d5c5c''#1f2e2e']    },    7: { # 质感静谧深邃风格:严谨物理与地球科学常用高级色        'fill': ['#555555''#eccc68''#70a1ff''#70a1ff''#70a1ff'],        'edge': ['#2f3542''#ffa502''#1e90ff''#3742fa''#050c75']    },    8: { # 暖阳植物生机风格:适合分子植物及生态学期刊的配色        'fill': ['#57606f''#f6b93b''#a8e6cf''#a8e6cf''#a8e6cf'],        'edge': ['#2f3542''#e67e22''#38ef7d''#11998e''#085047']    },    9: { # 霓虹科技未来风格:适合材料科学、纳米技术的现代高亮配色        'fill': ['#4b6584''#a55eea''#45aaf2''#45aaf2''#45aaf2'],        'edge': ['#130cb7''#8854d0''#2d98da''#4b7bec''#0652dd']    },    10: { # 莫兰迪高灰度风格:极高审美的低饱和度灰色调组合         'fill': ['#8e8e93''#e5dcd3''#cbdcd6''#cbdcd6''#cbdcd6'],         'edge': ['#3a3a3c''#bc9b8b''#8fae9e''#5e7e6f''#364e43']    }}

完整代码(模拟数据)

import osimport numpy as npimport pandas as pdimport matplotlib.pyplot as pltimport matplotlib.transforms as transformsfrom matplotlib.patches import Ellipsefrom matplotlib.ticker import FixedLocator# ==========================================# 1. 自动化目录与数据读取检查# ==========================================output_dir = "图表"if not os.path.exists(output_dir):    os.makedirs(output_dir)excel_path = "data.xlsx"if not os.path.exists(excel_path):    raise FileNotFoundError(f"未在当前目录下找到 '{excel_path}' 文件,请先创建并填充数据。")df = pd.read_excel(excel_path)# ==========================================# 2. 置信椭圆绘制辅助函数# ==========================================def draw_confidence_ellipse(ax, x, y, edgecolor, facecolor, alpha=0.15, n_std=2.0):    if len(x) < 3:        return    cov = np.cov(x, y)    pearson = cov[01] / np.sqrt(cov[00] * cov[11])    ell_radius_x = np.sqrt(1 + pearson)    ell_radius_y = np.sqrt(1 - pearson)    ellipse = Ellipse((00), width=ell_radius_x * 2, height=ell_radius_y * 2,                      facecolor=facecolor, edgecolor=edgecolor, alpha=alpha, linewidth=1)    scale_x = np.sqrt(cov[00]) * n_std    mean_x = np.mean(x)    scale_y = np.sqrt(cov[11]) * n_std    mean_y = np.mean(y)    transf = transforms.Affine2D() \        .rotate_deg(45) \        .scale(scale_x, scale_y) \        .translate(mean_x, mean_y)    ellipse.set_transform(transf + ax.transData)    ax.add_patch(ellipse)# ==========================================# 3. 10种专业科研配色方案字典 (符合主流期刊标准)# ==========================================# 每种方案包含两部分:# 'fill': 对应 ['Parental', 'LN1', 'LN7', 'LN8', 'LN9'] 的数据点填充颜色# 'edge': 对应 ['Parental', 'LN1', 'LN7', 'LN8', 'LN9'] 的图例边框及线条颜色color_schemes = {    1: { # 经典 Nature/Science 风格:高对比度清爽自然色系        'fill': ['#6d6d6d''#e6a3d8''#79d2a6''#79d2a6''#79d2a6'],        'edge': ['#1a1a1a''#b359a3''#40bf80''#009966''#004d33']    }}# 选择方案 1selected_scheme = color_schemes[3]groups = ['Parental''LN1''LN7''LN8''LN9']color_map = dict(zip(groups, selected_scheme['fill']))edge_map = dict(zip(groups, selected_scheme['edge']))fig, ax = plt.subplots(figsize=(6.56.5), dpi=200)ax.set_facecolor('white')ax.grid(True, color='#e0e0e0', linestyle='-', linewidth=0.6, zorder=0)# ==========================================# 4. 核心绘制逻辑# ==========================================# 4.1 绘制置信阴影圈df_p = df[df['Group'] == 'Parental']draw_confidence_ellipse(ax, df_p['Component 1'], df_p['Component 2'],                        edgecolor='none', facecolor=color_map['Parental'], alpha=0.4, n_std=1.8)df_ln1 = df[df['Group'] == 'LN1']draw_confidence_ellipse(ax, df_ln1['Component 1'], df_ln1['Component 2'],                        edgecolor='none', facecolor='#f7d3f2' if selected_scheme == color_schemes[1else color_map['LN1'], alpha=0.5, n_std=1.9)df_late = df[df['Group'].isin(['LN7''LN8''LN9'])]draw_confidence_ellipse(ax, df_late['Component 1'], df_late['Component 2'],                        edgecolor='none', facecolor='#cceedd' if selected_scheme == color_schemes[1else color_map['LN7'], alpha=0.5, n_std=1.8)df_late_sub = df[df['Group'].isin(['LN7''LN8'])]draw_confidence_ellipse(ax, df_late_sub['Component 1'], df_late_sub['Component 2'],                        edgecolor='none', facecolor='#bfe8d3' if selected_scheme == color_schemes[1else color_map['LN8'], alpha=0.4, n_std=1.6)# 4.2 绘制数据散点与图例groups_order = ['LN1''LN7''LN8''LN9''Parental']legend_elements = []for grp in groups_order:    grp_data = df[df['Group'] == grp]    color = color_map[grp]    edge_c = edge_map[grp]    if grp == 'Parental':        sc = ax.scatter(grp_data['Component 1'], grp_data['Component 2'],                        color=color, edgecolor=edge_c, s=140, linewidths=1.2, zorder=4)        leg_handle = plt.Line2D([0], [0], marker='o', color='none',                                markerfacecolor=color, markeredgecolor=edge_c,                                markersize=9, markeredgewidth=1.2)    else:        sc = ax.scatter(grp_data['Component 1'], grp_data['Component 2'],                        color=color, edgecolor=edge_c, s=140, linewidths=1.2, alpha=0.85, zorder=5)        leg_handle = plt.Line2D([0], [0], marker='o', color='none',                                markerfacecolor='none', markeredgecolor=edge_c,                                markersize=9, markeredgewidth=1.2)    legend_elements.append((leg_handle, grp))# ==========================================# 5. 坐标轴、标签与文本还原# ==========================================x_ticks = [-3e6, -2e6, -1e601e62e6]y_ticks = [-5e505e51e6]ax.set_xlim(-3.5e62.5e6)ax.set_ylim(-6.5e051.1e6)ax.set_box_aspect(1)ax.xaxis.set_major_locator(FixedLocator(x_ticks))ax.yaxis.set_major_locator(FixedLocator(y_ticks))ax.set_xticklabels(    ['$-3 \\times 10^6$''$-2 \\times 10^6$''$-1 \\times 10^6$''$0$''$1 \\times 10^6$''$2 \\times 10^6$'])ax.set_yticklabels(['$-5 \\times 10^5$''$0$''$5 \\times 10^5$''$1 \\times 10^6$'])ax.set_xlabel('Component 1', fontsize=12, labelpad=8)ax.set_ylabel('Component 2', fontsize=12, labelpad=8)ax.spines['top'].set_visible(True)ax.spines['right'].set_visible(True)ax.spines['left'].set_color('#333333')ax.spines['bottom'].set_color('#333333')ax.text(-3.0e6, -4.2e5'Parental', fontsize=11, color='black',        fontproperties='SimHei' if os.name == 'nt' else 'sans-serif')ax.text(0.3e68.5e5'Late LN\nmetastatic lines', fontsize=11, color=edge_map['LN9'], ha='center', va='center')handles, labels = zip(*legend_elements)ax.legend(handles, labels, loc='center left', bbox_to_anchor=(1.050.5),          frameon=False, handletextpad=0.5, labelspacing=0.8, fontsize=11)plt.tight_layout()fig.canvas.draw()pos = ax.get_position()fig.text(pos.x0 - 0.12, pos.y1 + 0.02'a', fontsize=18, fontweight='bold', zorder=10)# ==========================================# 6. 保存输出# ==========================================output_path = os.path.join(output_dir, "PCA_Component_Plot.png")plt.savefig(output_path, bbox_inches='tight', dpi=300)plt.close()print(f"\n图像已成功保存至: {output_path}")

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  1. CONNECT:[ UseTime:0.000885s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001279s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.008902s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.007219s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001277s ]
  6. SELECT * FROM `set` [ RunTime:0.000467s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001191s ]
  8. SELECT * FROM `article` WHERE `id` = 500078 LIMIT 1 [ RunTime:0.052644s ]
  9. UPDATE `article` SET `lasttime` = 1783016982 WHERE `id` = 500078 [ RunTime:0.023143s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.003232s ]
  11. SELECT * FROM `article` WHERE `id` < 500078 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000514s ]
  12. SELECT * FROM `article` WHERE `id` > 500078 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000397s ]
  13. SELECT * FROM `article` WHERE `id` < 500078 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.004715s ]
  14. SELECT * FROM `article` WHERE `id` < 500078 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.044911s ]
  15. SELECT * FROM `article` WHERE `id` < 500078 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.026897s ]
0.314070s