# Conversion

When download single cell or spatial matrix data, because of the size of the data, Connected Multiomics needs to first convert the files in the data node to a different file format, then transfer to your local computer.

Click on a count data node or normalized count data node, there are two options in conversion section:

<div align="left"><figure><img src="/files/NUuAnhRUCR0T7xaKiAL1" alt="" width="192"><figcaption></figcaption></figure></div>

#### Export to h5ad files:

This option allows to export cell by feature matrix with other annotation of the cells, like PCA, UMAP, t-SNE coordinates of the cells and cluster annotation if they are performed in the analysis:

<div align="left"><figure><img src="/files/2B8pgQ01Bw57QaOjowcy" alt="" width="277"><figcaption></figcaption></figure></div>

Click on each of the **Select data node** to choose the node in the analysis pipeline, you can select only one of the same annotation type if performed multiple times of the same task, e.g. you perform graph-based cluster task multiple times with different parameter, you can only choose one to export.

After click **Finish**, you will see a new data node generated, click on the node, you can download the file:

![](/files/2KpdaIIYs4E7jAc5Zh8H)

#### Export matrix

This option allows you to export a text file of the full matrix or sparse matrix in 10X CellRanger .h5 format:

<div align="left"><figure><img src="/files/9xOWRqgXqFtnrYovZMP2" alt="" width="209"><figcaption></figcaption></figure></div>

When export the full matrix in .txt file, you can choose features on columns or rows. You can choose to export annotation and/counts in the matrix by check the boxes in the *Include content* section. Only one level of annotation can be exported depends who is on row in the text file: if you choose **features on columns** option, cells will be on rows, then only cell annotation will be exported; if you choose f**eatures on rows**, then only feature annotation will be exported.

If you have multiple samples in the analysis, check **Combine samples** will generate one text file with all the cells from all the samples. If you don't check the box, you will generate one text file for each sample individually.


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