{"id":216449,"date":"2025-05-19T09:12:59","date_gmt":"2025-05-19T09:12:59","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=216449"},"modified":"2025-05-19T09:13:02","modified_gmt":"2025-05-19T09:13:02","slug":"integer-indexing-array","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/05\/19\/integer-indexing-array\/","title":{"rendered":"Integer indexing array"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Integer indexing array: Shift left Write a <em>single<\/em> statement that shifts row array attendance Values one position to the left. The rightmost element in shiftedValues also keeps its value. Ex: [10, 20, 30 40] after shifting becomes [20, 30, 40, 40]. Function &gt; 1 function attendanceValues= ShiftValues (attendanceValues) 2 % attendanceValues: Array contains 4 elements recording attendence for the last 4 shows 3 4561 7 end % Change indexing values attendanceValues (1:1) = attendanceValues (1:1); Code to call your function &gt; Save C Reset 1 ShiftValues ([10, 20, 30, 40]) 2 attendance-ShiftValues (attendance) MATLAB Documentation C Reset Run Function<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-0-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 Correct MATLAB Statement:<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>attendanceValues(1:3) = attendanceValues(2:4);\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udcd8 Explanation (300+ words):<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">This MATLAB problem involves shifting the elements of a <strong>row vector<\/strong> one position to the <strong>left<\/strong>, while <strong>keeping the last element unchanged<\/strong>. Let&#8217;s walk through it carefully.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\ud83d\udd0d Problem Breakdown:<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Suppose you have an array:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>attendanceValues = &#91;10, 20, 30, 40];\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Your goal is to shift every element to the left by one position. The new array should be:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;20, 30, 40, 40]\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">This transformation moves:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>attendanceValues(2)<\/code> (20) into position 1,<\/li>\n\n\n\n<li><code>attendanceValues(3)<\/code> (30) into position 2,<\/li>\n\n\n\n<li><code>attendanceValues(4)<\/code> (40) into position 3,<\/li>\n\n\n\n<li>and keeps the last element (<code>attendanceValues(4)<\/code>) unchanged.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\ud83e\udde0 Why <code>attendanceValues(1:3) = attendanceValues(2:4)<\/code> works:<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">This uses <strong>vectorized indexing<\/strong>, a powerful MATLAB feature that lets you assign multiple values in one line.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>attendanceValues(1:3)<\/code> targets the <strong>first three<\/strong> elements (10, 20, 30).<\/li>\n\n\n\n<li><code>attendanceValues(2:4)<\/code> gives the <strong>next three<\/strong> elements (20, 30, 40).<\/li>\n\n\n\n<li>When assigned, the left side gets replaced by the right side:<br>So, <code>[10, 20, 30]<\/code> becomes <code>[20, 30, 40]<\/code>.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>4th element remains unchanged<\/strong>, which is exactly what the problem requires.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u26a0\ufe0f Common Pitfalls:<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Using loops:<\/strong> While a <code>for<\/code> loop could also do this, the problem clearly asks for a <strong>single statement<\/strong>.<\/li>\n\n\n\n<li><strong>Overwriting values too early:<\/strong> If you start assigning from index 1 without saving the original values, you can corrupt the data. Vectorized assignment avoids this issue.<\/li>\n\n\n\n<li><strong>Trying to shift the last element:<\/strong> The problem says to <strong>keep the last element<\/strong> as it is \u2014 so we only modify the first three.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u2705 Summary:<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">This concise and efficient line correctly shifts the values:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>attendanceValues(1:3) = attendanceValues(2:4);\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">It leverages MATLAB\u2019s strength in matrix operations and avoids unnecessary complexity.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Integer indexing array: Shift left Write a single statement that shifts row array attendance Values one position to the left. The rightmost element in shiftedValues also keeps its value. Ex: [10, 20, 30 40] after shifting becomes [20, 30, 40, 40]. Function &gt; 1 function attendanceValues= ShiftValues (attendanceValues) 2 % attendanceValues: Array contains 4 elements [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-216449","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/216449","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=216449"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/216449\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=216449"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=216449"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=216449"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}