<div dir="ltr">What other ways have you tried?<br><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Jan 9, 2021 at 2:15 PM <<a href="mailto:klark--kent@yandex.ru">klark--kent@yandex.ru</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hello. <span style="color:rgb(12,13,14);font-family:"helvetica neue","helvetica","arial",sans-serif;font-size:15px">There is a random 1D array m_0 with size 3000, for example:</span><pre style="border:0px none;border-radius:5px;box-sizing:inherit;font-family:"consolas","menlo","monaco","lucida console","liberation mono","dejavu sans mono","bitstream vera sans mono","courier new",monospace,sans-serif;line-height:1.30769;margin-top:0px;max-height:300px;overflow:auto;padding:12px;vertical-align:baseline"><code style="border:0px none;box-sizing:inherit;font-family:inherit;font-style:inherit;font-variant:inherit;font-weight:inherit;line-height:inherit;margin:0px;max-height:300px;padding:0px;vertical-align:baseline">m_0 = np.array([<span style="border:0px none;box-sizing:inherit;font:inherit;margin:0px;padding:0px;vertical-align:baseline">0</span>, <span style="border:0px none;box-sizing:inherit;font:inherit;margin:0px;padding:0px;vertical-align:baseline">1</span>, <span style="border:0px none;box-sizing:inherit;font:inherit;margin:0px;padding:0px;vertical-align:baseline">2</span>])
</code></pre><p style="border:0px none;box-sizing:inherit;color:rgb(12,13,14);font-family:"helvetica neue","helvetica","arial",sans-serif;font-size:15px;line-height:inherit;margin-left:0px;margin-right:0px;margin-top:0px;padding:0px;vertical-align:baseline">I need to generate two 1D arrays:</p><pre style="border:0px none;border-radius:5px;box-sizing:inherit;font-family:"consolas","menlo","monaco","lucida console","liberation mono","dejavu sans mono","bitstream vera sans mono","courier new",monospace,sans-serif;line-height:1.30769;margin-top:0px;max-height:300px;overflow:auto;padding:12px;vertical-align:baseline"><code style="border:0px none;box-sizing:inherit;font-family:inherit;font-style:inherit;font-variant:inherit;font-weight:inherit;line-height:inherit;margin:0px;max-height:300px;padding:0px;vertical-align:baseline">m_1 = np.array([<span style="border:0px none;box-sizing:inherit;font:inherit;margin:0px;padding:0px;vertical-align:baseline">0</span>, <span style="border:0px none;box-sizing:inherit;font:inherit;margin:0px;padding:0px;vertical-align:baseline">1</span>, <span style="border:0px none;box-sizing:inherit;font:inherit;margin:0px;padding:0px;vertical-align:baseline">2</span>, <span style="border:0px none;box-sizing:inherit;font:inherit;margin:0px;padding:0px;vertical-align:baseline">0</span>, <span style="border:0px none;box-sizing:inherit;font:inherit;margin:0px;padding:0px;vertical-align:baseline">1</span>, <span style="border:0px none;box-sizing:inherit;font:inherit;margin:0px;padding:0px;vertical-align:baseline">2</span>, <span style="border:0px none;box-sizing:inherit;font:inherit;margin:0px;padding:0px;vertical-align:baseline">0</span>, <span style="border:0px none;box-sizing:inherit;font:inherit;margin:0px;padding:0px;vertical-align:baseline">1</span>, <span style="border:0px none;box-sizing:inherit;font:inherit;margin:0px;padding:0px;vertical-align:baseline">2</span>])
m_2 = np.array([<span style="border:0px none;box-sizing:inherit;font:inherit;margin:0px;padding:0px;vertical-align:baseline">0</span>, <span style="border:0px none;box-sizing:inherit;font:inherit;margin:0px;padding:0px;vertical-align:baseline">0</span>, <span style="border:0px none;box-sizing:inherit;font:inherit;margin:0px;padding:0px;vertical-align:baseline">0</span>, <span style="border:0px none;box-sizing:inherit;font:inherit;margin:0px;padding:0px;vertical-align:baseline">1</span>, <span style="border:0px none;box-sizing:inherit;font:inherit;margin:0px;padding:0px;vertical-align:baseline">1</span>, <span style="border:0px none;box-sizing:inherit;font:inherit;margin:0px;padding:0px;vertical-align:baseline">1</span>, <span style="border:0px none;box-sizing:inherit;font:inherit;margin:0px;padding:0px;vertical-align:baseline">2</span>, <span style="border:0px none;box-sizing:inherit;font:inherit;margin:0px;padding:0px;vertical-align:baseline">2</span>, <span style="border:0px none;box-sizing:inherit;font:inherit;margin:0px;padding:0px;vertical-align:baseline">2</span>])
</code></pre><p style="border:0px none;box-sizing:inherit;color:rgb(12,13,14);font-family:"helvetica neue","helvetica","arial",sans-serif;font-size:15px;line-height:inherit;margin-left:0px;margin-right:0px;margin-top:0px;padding:0px;vertical-align:baseline">Is there faster way to do it than this one:</p><pre style="border:0px none;border-radius:5px;box-sizing:inherit;font-family:"consolas","menlo","monaco","lucida console","liberation mono","dejavu sans mono","bitstream vera sans mono","courier new",monospace,sans-serif;line-height:1.30769;margin-top:0px;max-height:300px;overflow:auto;padding:12px;vertical-align:baseline"><code style="border:0px none;box-sizing:inherit;font-family:inherit;font-style:inherit;font-variant:inherit;font-weight:inherit;line-height:inherit;margin:0px;max-height:300px;padding:0px;vertical-align:baseline"><span style="border:0px none;box-sizing:inherit;font:inherit;margin:0px;padding:0px;vertical-align:baseline">import</span> numpy <span style="border:0px none;box-sizing:inherit;font:inherit;margin:0px;padding:0px;vertical-align:baseline">as</span> np
<span style="border:0px none;box-sizing:inherit;font:inherit;margin:0px;padding:0px;vertical-align:baseline">import</span> time
N = <span style="border:0px none;box-sizing:inherit;font:inherit;margin:0px;padding:0px;vertical-align:baseline">3</span>
m_0 = np.arange(N)

t = time.time()
m_1 = np.tile(m_0, N)
m_2 = np.repeat(m_0, N)
t = time.time() - t</code></pre><pre style="border:0px none;border-radius:5px;box-sizing:inherit;font-family:"consolas","menlo","monaco","lucida console","liberation mono","dejavu sans mono","bitstream vera sans mono","courier new",monospace,sans-serif;line-height:1.30769;margin-top:0px;max-height:300px;overflow:auto;padding:12px;vertical-align:baseline"><code style="border:0px none;box-sizing:inherit;font-family:inherit;font-style:inherit;font-variant:inherit;font-weight:inherit;line-height:inherit;margin:0px;max-height:300px;padding:0px;vertical-align:baseline">I tried other ways but they are slower or have the same time. Other NumPy operations in my code 10-100 times faster. </code>Why the repeating an array is so slow? I need 10 times speed up. Thank you for your attantion to my problem.</pre>_______________________________________________<br>
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</blockquote></div></div>