<p>It looks like it's in GEO here: <a href="https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GPL10187" rel="nofollow noreferrer">https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GPL10187</a></p>

<p>There is apparently a zipped copy linked at the bottom in the supplementary files.</p>

<p>When people upload a study based on an array, there is a corresponding 'platform' record where the array details should be deposited.</p>

<p>Edit: you will probably need to gunzip the file first, to get it into CDF format.</p>

CC BY-SA 4.0
2019-03-05T13:38:31.653Z
2019-03-05T14:07:45.980Z
2019-03-05T14:07:45.980Z
Jay Moore
<p>I am analysing microarray ChIP data generated several years ago. I want to use the <em>affy</em> package for R. However, in order to load the CEL files and proceed with the analysis, I need the pombe annotation file which comes under the name of <strong>Sp20b_M_v04.cdf</strong>. I have looked everywhere for this file but I am unable to locate it. Is anyone in possession of this file or know where I can download it from?</p>

CC BY-SA 4.0
2019-03-04T14:33:19.440Z
Welcome to Bioinformatics.StackExchange @Min! Could you let us know where the instructions indicate that you need the **Sp20b_M_v04.cdf** file? Is this from a colleague's lab notebook, or from the *affy* package's documentation, or somewhere else? This info will be helpful in troublehshooting.
Daniel Standage
CC BY-SA 4.0
2019-03-04T15:23:37.590Z
Hi Min, completely agree with @DanielStandage. You need to [edit] your question and add lot more details, otherwise, it's really hard to help.
Kamil S Jaron
CC BY-SA 4.0
2019-03-04T15:27:06.873Z
@KamilSJaron I converted your answer to a comment since it wasn't really providing a full answer to the question.
terdon
CC BY-SA 4.0
2019-03-04T15:30:44.930Z
@terdon I was about to delete it because it was the CEL file I linked, not cdf. ^^
Kamil S Jaron
CC BY-SA 4.0
2019-03-04T15:32:59.853Z
@min I found the corresponding [ncbi geo page](https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSM758780). it seems that the file you are referring to isn't uploaded. You must contact authors I believe.
Kamil S Jaron
CC BY-SA 4.0
2019-03-04T15:59:49.687Z
Crossposted with [biostars](https://www.biostars.org/p/367285/)?
llrs
<r><microarray>
Where can I find .cdf files for Affymetrix ChIP-chip data analysis?
# Where can I find .cdf files for Affymetrix ChIP-chip data analysis?

(Asked by: username_0 on 2019-03-04)

I am analysing microarray ChIP data generated several years ago. I want to use the *affy* package for R. However, in order to load the CEL files and proceed with the analysis, I need the pombe annotation file which comes under the name of **Sp20b\_M\_v04.cdf**. I have looked everywhere for this file but I am unable to locate it. Is anyone in possession of this file or know where I can download it from?

**Tags:** r, microarray
> **Comments:**
> **username_1**: Welcome to Bioinformatics.StackExchange @Min! Could you let us know where the instructions indicate that you need the **Sp20b_M_v04.cdf** file? Is this from a colleague's lab notebook, or from the *affy* package's documentation, or somewhere else? This info will be helpful in troublehshooting.  
> **username_2**: Hi Min, completely agree with @DanielStandage. You need to [edit] your question and add lot more details, otherwise, it's really hard to help.  
> **username_3**: @KamilSJaron I converted your answer to a comment since it wasn't really providing a full answer to the question.  
> **username_2**: @terdon I was about to delete it because it was the CEL file I linked, not cdf. ^^  
> **username_2**: @min I found the corresponding [ncbi geo page](https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSM758780). it seems that the file you are referring to isn't uploaded. You must contact authors I believe.  
> **username_4**: Crossposted with [biostars](https://www.biostars.org/p/367285/)?  

---

## 1 answers

### Answer by username_5 on 2019-03-05. Score: 1

It looks like it's in GEO here: <https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GPL10187>

There is apparently a zipped copy linked at the bottom in the supplementary files.

When people upload a study based on an array, there is a corresponding 'platform' record where the array details should be deposited.

Edit: you will probably need to gunzip the file first, to get it into CDF format.


---

