Solved: zoom disappeared

Zoom Disappearances – A Troubleshooting Guide

Zoom Disappearance is a common occurrence that may cause slight interruptions, leading to inefficient workflow among Matlab users. It’s an issue whereupon zooming on a plotted figure, some data points may not be visible, causing high inconvenience. This article intends to guide you through an understanding of this problem, its potential solutions, and step-by-step instructions on implementing the fix using Matlab’s unique functions and libraries.

Understanding the Issue: Zoom Disappearance in Matlab

The first step towards resolving a issue is to comprehend what is happening. When it comes to dealing with programming language such as Matlab, it becomes crucial to understand the nature of the problem, the functions used, and the libraries involved. This helps us ensure an accurate and effective solution for the problem at hand.

Zoom Disappearance is essentially a graphical issue wherein the plotting view in Matlab is disrupted. This happens when we use the zoom function to closely inspect certain areas of the plotted graph. In such instances, some data points seem to disappear or are not visible, despite being present in the data set. It poses an issue when we need to analyze intricate details and patterns in the data.

Solution: Fixing Zoom Disappearance

The primary solution to this problem involves proper programming within Matlab. As a powerful and versatile programming tool, Matlab offers multiple functionalities, commands, and libraries that aids in resolving such graphics-based issues. Proper usage of these functions can ensure a detailed and clear graphical representation of data in Matlab.

First, we must ensure to instruct Matlab at the beginning of coding to hold the graphics on the existing figure and then, plot the desired points. By doing so, all points appear accurately and no point is lost when we zoom. These two commands are added before the plot function, using

hold on;



where X and Y are the landmark coordinates.

Step-by-Step Code Explanation

Matlab is renowned for its extensive function library that allows users to solve complex issues, including Zoom Disappearance. Let’s break down the code:

Step 1:
Use the command

hold on;

before plotting any points or graphs. This command tells Matlab to hold the current figure or axes for subsequent plots.

Step 2:
Plot all your desired points or graphs that will best suit your data analysis.
Use the command


to plot the values of Y at the corresponding values of X. This command plots the data points on your current plot, without erasing any existing data points.

Ultimately, by correctly incorporating these commands in the Matlab code, we can manage the zoom function without having to worry about data point disappearances, thereby optimizing Matlab’s plotting capability.

Troubleshooting Related Queries

Matlab offers an expansive range of functions in its library. This provides us with a medium to not only troubleshoot our current issue but also understand similar issues and how to rectify them. We explored the use of the “hold on” function to resolve zoom disappearance.

Similarly, there are cases when we face issues while trying to overlay multiple graphics on Matlab’s grafic window. For these cases, we can use the same

hold on;

function. This allows Matlab to hold the current graphic and overlay subsequent graphics on it, without erasing the previous ones. Moreover, a common issue is that of disappearing legends after using the zoom function. A simple fix to this issue is to include the

legend show;

command after plotting our data points. This command confirms that the legend stays visible after zooming in on the plot.

Thus, there are simplified ways to resolve these related issues with zoom and disappearing data points or legends with proper application of Matlab commands.

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