{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Show4DSTEM in Google Colab\n",
    "\n",
    "[![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/?url=https%3A%2F%2Fhuggingface.co%2Fdatasets%2Fbobleesj%2Fquantem-data%2Fresolve%2Fmain%2Fnotebooks%2Fshow4dstem_colab.ipynb)\n",
    "\n",
    "Open a 4D-STEM dataset in your browser - **no install, no GPU setup**. Runs on Colab's\n",
    "Open a 4D-STEM dataset in your browser - **no install, no GPU setup**. On Colab's free **Tesla T4**, Show4DSTEM runs on the **GPU via PyTorch (CUDA)** - NumPy is only the input format; it is uploaded to the GPU. (On a CPU-only runtime it falls back to CPU.)\n",
    "any runtime (CPU or GPU).\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 1. Install (one cell)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "!pip install -U -i https://test.pypi.org/simple/ --extra-index-url https://pypi.org/simple \"quantem.widget>=0.0.1rc0\" huggingface_hub\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 2. Download a sample + open it\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "import numpy as np\n",
    "from quantem.widget import Show4DSTEM\n",
    "from quantem.widget.io import download\n",
    "\n",
    "path = download('gold_512_npy_bin4')          # ~25 MB from Hugging Face\n",
    "data = np.load(f'{path}/data.npy')            # (512, 512, 48, 48) 4D-STEM\n",
    "Show4DSTEM(data)\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "**Interact:** drag the detector ROI (left) -> the virtual image (right) updates live.\n",
    "Drag the scan cursor on the virtual image -> the diffraction pattern follows your finger.\n",
    "\n",
    "To use your own data, upload an Arina `*_master.h5` and run\n",
    "`Show4DSTEM(load('your_master.h5', det_bin=2))` (`from quantem.widget import load`).\n"
   ]
  }
 ],
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  "accelerator": "GPU",
  "colab": {
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   "gpuType": "T4"
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