{"id":1754,"date":"2023-01-06T00:46:40","date_gmt":"2023-01-06T08:46:40","guid":{"rendered":"https:\/\/gantovnik.com\/bio-tips\/?p=1754"},"modified":"2023-01-06T00:46:40","modified_gmt":"2023-01-06T08:46:40","slug":"334-polar-plot-using-python","status":"publish","type":"post","link":"https:\/\/gantovnik.com\/bio-tips\/2023\/01\/334-polar-plot-using-python\/","title":{"rendered":"#334 Polar plot using python"},"content":{"rendered":"<p><a href=\"https:\/\/gantovnik.com\/bio-tips\/2023\/01\/334-polar-plot-using-python\/ex334\/\" rel=\"attachment wp-att-1755\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2023\/01\/ex334.png?resize=432%2C288&#038;ssl=1\" alt=\"\" width=\"432\" height=\"288\" class=\"alignnone size-full wp-image-1755\" srcset=\"https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2023\/01\/ex334.png?w=432&amp;ssl=1 432w, https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2023\/01\/ex334.png?resize=300%2C200&amp;ssl=1 300w, https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2023\/01\/ex334.png?resize=150%2C100&amp;ssl=1 150w\" sizes=\"(max-width: 432px) 100vw, 432px\" \/><\/a><\/p>\n<p>ex334.py<\/p>\n<pre class=\"brush: python; title: ; notranslate\" title=\"\">\r\nimport numpy as np\r\nimport matplotlib.pyplot as plt\r\nplt.axes(projection = 'polar')\r\n# creating an array\r\n# containing the angle values\r\nrads = np.arange(0,(2*np.pi),0.1)\r\na=6\r\n# plotting the cardioid\r\nfor rad in rads:\r\n    r = a*(1 + np.cos(rad)) \r\n    plt.polar(rad,r,'ro',markersize=4)  \r\nplt.savefig('ex334.png', dpi=72)\r\nplt.show()\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>ex334.py import numpy as np import matplotlib.pyplot as plt plt.axes(projection = &#8216;polar&#8217;) # creating an array # containing the angle values rads = np.arange(0,(2*np.pi),0.1) a=6 # plotting the cardioid for rad in rads: r = a*(1 + np.cos(rad)) plt.polar(rad,r,&#8217;ro&#8217;,markersize=4) plt.savefig(&#8216;ex334.png&#8217;, dpi=72) plt.show()<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","_lmt_disableupdate":"yes","_lmt_disable":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[69,2],"tags":[70,3],"class_list":["post-1754","post","type-post","status-publish","format-standard","hentry","category-matplotlib","category-python","tag-matplotlib","tag-python"],"modified_by":"gantovnik","jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p8bH0k-si","jetpack_likes_enabled":true,"jetpack-related-posts":[{"id":2048,"url":"https:\/\/gantovnik.com\/bio-tips\/2024\/01\/405-cardioid-in-polar-coordinates-by-matplot-in-python\/","url_meta":{"origin":1754,"position":0},"title":"#405 Cardioid in polar coordinates by matplotlib in python","author":"gantovnik","date":"2024-01-14","format":false,"excerpt":"A cardioid is a two-dimensional plane figure that has a heart-shaped curve described in polar coordinates by the equation r = 2a(1 + cos \u03b8) for 0 \u2264 \u03b8 \u2264 2\u03c0: [code language=\"python\"] import numpy as np import matplotlib.pyplot as plt theta = np.linspace(0, 2.*np.pi, 1000) a = 1.0 r\u2026","rel":"","context":"In &quot;math&quot;","block_context":{"text":"math","link":"https:\/\/gantovnik.com\/bio-tips\/category\/math\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2024\/01\/ex405.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2024\/01\/ex405.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2024\/01\/ex405.png?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":2140,"url":"https:\/\/gantovnik.com\/bio-tips\/2024\/02\/417-polar-plot-using-sympy-plotting-functions-in-python\/","url_meta":{"origin":1754,"position":1},"title":"#417 Polar plot using SymPy plotting functions in python","author":"gantovnik","date":"2024-02-21","format":false,"excerpt":"[code language=\"python\"] import matplotlib.pyplot as plt from sympy import symbols, sin, cos, pi, latex from spb import plot_polar x = symbols(\"x\") expr = sin(2 * x) * cos(5 * x) + pi \/ 2 plot_polar(expr, (x, 0, 2 * pi), polar_axis=True, ylim=(0, 3), title=\"$%s$\" % latex(expr)) plt.savefig(\"ex417.png\", dpi=100) plt.show() [\/code]","rel":"","context":"In &quot;matplotlib&quot;","block_context":{"text":"matplotlib","link":"https:\/\/gantovnik.com\/bio-tips\/category\/matplotlib\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2024\/02\/ex417.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2024\/02\/ex417.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2024\/02\/ex417.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2024\/02\/ex417.png?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":1980,"url":"https:\/\/gantovnik.com\/bio-tips\/2023\/12\/397-spiral-that-goes-around-circular-paraboloid-by-python\/","url_meta":{"origin":1754,"position":2},"title":"#397 Spiral that goes around circular paraboloid by python","author":"gantovnik","date":"2023-12-18","format":false,"excerpt":"[code language=\"python\"] import numpy as np import matplotlib.pyplot as plt fig = plt.figure() ax = plt.axes(projection='3d') # Surface ------------------ # Create the mesh in polar coordinates and compute corresponding Z r0 = 5 r = np.linspace(0, r0, 50) p = np.linspace(0, 2*np.pi, 50) R, P = np.meshgrid(r, p) Z =\u2026","rel":"","context":"In &quot;matplotlib&quot;","block_context":{"text":"matplotlib","link":"https:\/\/gantovnik.com\/bio-tips\/category\/matplotlib\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2023\/12\/ex397.png?fit=640%2C480&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2023\/12\/ex397.png?fit=640%2C480&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2023\/12\/ex397.png?fit=640%2C480&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":82,"url":"https:\/\/gantovnik.com\/bio-tips\/2018\/12\/plot-with-an-inset\/","url_meta":{"origin":1754,"position":3},"title":"#12: Plot with an inset in python","author":"gantovnik","date":"2018-12-29","format":false,"excerpt":"[code language=\"python\"] import os import matplotlib as mpl import matplotlib.pyplot as plt import numpy as np os.chdir('\/home\/vg\/Downloads\/projects\/ex12') os.getcwd() fig = plt.figure(figsize=(10,8)) def f(x): return 1\/(1+x**2) + 0.1\/(1+((3-x)\/0.1)**2) def plot_and_format_axes(ax,x,f,fontsize): ax.plot(x,f(x),linewidth=2) ax.xaxis.set_major_locator(mpl.ticker.MaxNLocator(5)) ax.yaxis.set_major_locator(mpl.ticker.MaxNLocator(4)) ax.set_xlabel(r\"$x$\",fontsize=fontsize) ax.set_ylabel(r\"$f(x)$\",fontsize=fontsize) ax=fig.add_axes([0.1,0.15,0.8,0.8],facecolor=\"#f5f5f5\") x = np.linspace(-4,14,1000) plot_and_format_axes(ax,x,f,18) plt.title('Plot with inset') x0,x1=2.5,3.5 ax.axvline(x0,ymax=0.3,color=\"grey\",linestyle=\":\") ax.axvline(x1,ymax=0.3,color=\"grey\",linestyle=\":\") ax_insert=fig.add_axes([0.5,0.5,0.38,0.42],facecolor='none') x=np.linspace(x0,x1,1000) plot_and_format_axes(ax_insert,x,f,14) plt.savefig(\"example12.png\", dpi=100)\u2026","rel":"","context":"In &quot;matplotlib&quot;","block_context":{"text":"matplotlib","link":"https:\/\/gantovnik.com\/bio-tips\/category\/matplotlib\/"},"img":{"alt_text":"example12","src":"https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2018\/12\/example12.png?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2018\/12\/example12.png?resize=350%2C200 1x, https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2018\/12\/example12.png?resize=525%2C300 1.5x"},"classes":[]},{"id":2131,"url":"https:\/\/gantovnik.com\/bio-tips\/2024\/02\/415-tight_layout-in-matplotlib-in-python\/","url_meta":{"origin":1754,"position":4},"title":"#415 tight_layout() in matplotlib in python","author":"gantovnik","date":"2024-02-20","format":false,"excerpt":"[code language=\"python\"] import matplotlib.pyplot as plt import numpy as np fig, (ax1, ax2, ax3) = plt.subplots(1, 3, figsize=(10,3)) xx = np.linspace(1, 20, 1000) yy = np.log(xx**2 + 1) * np.sin(xx) + xx ax1.plot(xx, yy) ax2.scatter(sorted(xx), sorted(yy), s=1, marker=\".\", color=\"green\") ax3.hist(yy, bins=20, color=\"red\",edgecolor='black', alpha=.5) fig.tight_layout() plt.savefig(\"ex415.png\", dpi=100) plt.show() [\/code]","rel":"","context":"In &quot;matplotlib&quot;","block_context":{"text":"matplotlib","link":"https:\/\/gantovnik.com\/bio-tips\/category\/matplotlib\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2024\/02\/ex415.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2024\/02\/ex415.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2024\/02\/ex415.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2024\/02\/ex415.png?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":1880,"url":"https:\/\/gantovnik.com\/bio-tips\/2023\/07\/356-animation-of-plot-legend-using-python\/","url_meta":{"origin":1754,"position":5},"title":"#356 Animation of plot legend using python","author":"gantovnik","date":"2023-07-01","format":false,"excerpt":"[code language=\"python\"] # pip install celluloid #%matplotlib qt from matplotlib import pyplot as plt from celluloid import Camera import numpy as np fig = plt.figure() camera = Camera(fig) t = np.linspace(0, 2 * np.pi, 128, endpoint=False) for i in range(0,41) : p=plt.plot(t, i*np.sin(t)) plt.legend(p, [f'line {i}']) camera.snap() animation = camera.animate()\u2026","rel":"","context":"In &quot;animation&quot;","block_context":{"text":"animation","link":"https:\/\/gantovnik.com\/bio-tips\/category\/animation\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2023\/07\/ex356.gif?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2023\/07\/ex356.gif?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2023\/07\/ex356.gif?resize=525%2C300&ssl=1 1.5x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/posts\/1754","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/comments?post=1754"}],"version-history":[{"count":0,"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/posts\/1754\/revisions"}],"wp:attachment":[{"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/media?parent=1754"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/categories?post=1754"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/tags?post=1754"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}