插入图片时出现问题

Question

我一直试图将图像插入我的 LaTeX 测试书中，以便进一步进行实验，但我唯一看到的是文件路径的名称。我尝试了 stackoverflow 和其他网站上提出的一些解决方案，但都没有奏效——我错过了什么？

我已尝试过：

1. 包括如下图像：

\begin{figure}[h] 
    \centering
    \includegraphics[width=0.25\textwidth]{Plot}
    \caption{$J(\theta_0, \theta_1)$ as regards to $\theta_0$ and $\theta_1$}
    \label{fig:Fig1}
\end{figure}

2. 不要使用前面代码中的 Plot，而是使用Plot.png

3. 删除该\graphicspath{ {Images/} }行

笔记：

1. 图像（Plot.png）位于 Image 文件夹中。

2. 我使用 overleaf，然而，官方网站上的 overleaf 示例非常有效。

完整代码：

\documentclass[12pt, letterpaper]{book}
\usepackage[utf8]{inputenc}
\usepackage{graphicx}
\usepackage{grffile}
\usepackage[utf8]{amsmath, amssymb}
\graphicspath{ {Images/} }

\title{LINEAR REGRESSION IN DETAIL}
\author{Alexandros Voliotis \thanks{University of Thessaly}}
\date{May 2020}

\begin{document}

\maketitle
Test title of my first \textbf{ \LaTeX} document!


Italics: \textit{test}

Underline: \underline{test}


\chapter{Chapter 1}

\section{Introduction}

In the gradient descent algorithm we are trying to minimize the value of $J(\theta_0, \theta_1)$ for some $\theta_0, \theta_1 \in \mathbb{R}$.

This is quite tough to achieve in a few steps, however it is not entirely impossible. In order to make $J(\theta_0, \theta_1)$ equal to $0$, we must first set the step variable accordingly, and measure every time the output. This process should, and will, create a table with two columns as shown below:
\begin{itemize}
  \item 1\textsuperscript{st} column -- The values for the step variable.
  \item 2\textsuperscript{nd} column -- The values for the total tries variable.

\end{itemize}


A better visualization of the function $J(\theta_0, \theta_1)$ is as follows:

\begin{figure}[h] 
    \centering
    \includegraphics[width=0.25\textwidth]{Plot}
    \caption{$J(\theta_0, \theta_1)$ as regards to $\theta_0$ and $\theta_1$}
    \label{fig:Fig1}
\end{figure}
\end{document}

Answer 1

快速回答：包括\usepackage{float}并使用[H]而不是[h]

解释性回答：以下是我发现的错误或建议：

1. 标签、文件夹路径和其他通常指代对象的字母请使用小写字母。例如，使用\label{tbl:its an example}而不是\label{tbl:Its An Example}。为什么？因为我们通常会忘记大写字母。
2. 包括\usepackage{float}使用[H]或[h]包含\begin{figure}[H]在您的文档中。
3. \usepackage{amsmath} \usepackage{amssymb}如果此操作没有错误，则使用它代替您的代码。

我修复了以下代码中的一些常见错误：

\documentclass[12pt, letterpaper]{book}
\usepackage[utf8]{inputenc}
\usepackage{graphicx}
\usepackage{grffile}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{float} % For placement of figures, tables, and other objects
\graphicspath{{imagesfolder/}} % use lowercase to avoid errors for typing

\title{LINEAR REGRESSION IN DETAIL}
\author{Alexandros Voliotis \thanks{University of Thessaly}}
\date{May 2020}

\begin{document}

\maketitle
Test title of my first \textbf{ \LaTeX} document!


Italics: \textit{test}

Underline: \underline{test}


\chapter{Mathematics}

\section{Introduction}

In the gradient descent algorithm we are trying to minimize the value of $J(\theta_0, \theta_1)$ for some $\theta_0, \theta_1 \in \mathbb{R}$.

This is quite tough to achieve in a few steps, however it is not entirely impossible. In order to make $J(\theta_0, \theta_1)$ equal to $0$, we must first set the step variable accordingly, and measure every time the output. This process should, and will, create a table with two columns as shown below:
\begin{itemize}
  \item 1\textsuperscript{st} column -- The values for the step variable.
  \item 2\textsuperscript{nd} column -- The values for the total tries variable.

\end{itemize}


A better visualization of the function $ J(\theta_0, \theta_1) $ is as follows (\ref{fig:figure 1}):

\begin{figure}[H]
    \centering
    \includegraphics[width=0.5\textwidth]{image.png}
    \caption{$ J(\theta_0, \theta_1) $ as regards to $\ theta_0 $ and $ \theta_1 $}
    \label{fig:figure 1}
\end{figure}

\end{document}